This entry establishes the physical doctrine governing rivers, streams, lakes, watersheds, drainage basins, floodplains, deltas, estuaries, wetlands, and other major freshwater systems of Eldarûn.
Its central principle is:
Water follows the land.
Rain falls.
Snow melts.
Glaciers release water.
Springs emerge.
Small channels combine into larger channels.
Rivers descend through watersheds until they reach:
- lakes
- wetlands
- inland basins
- larger rivers
- seas
- or oceans
unless specific geography or supernatural canon establishes an exception.
Rivers do not exist independently from mountains and terrain.
Every river belongs to a drainage system.
Every drainage system reflects the elevations surrounding it.
1. The Hydrological Cycle
Fresh water on Eldarûn participates in a familiar planetary hydrological cycle.
Water:
- evaporates
- condenses
- falls as rain, snow, sleet, or other precipitation
- freezes
- melts
- infiltrates soil
- enters groundwater
- emerges through springs
- flows through streams and rivers
- collects in lakes and wetlands
- returns eventually to larger bodies of water
Magic can influence water locally.
It does not replace the planetary water cycle.
A magically altered river is still moving through a physical watershed unless canon specifically establishes otherwise.
2. Watersheds
A watershed, also called a drainage basin, is the entire area from which Surface water ultimately drains toward one connected outlet system.
A large watershed may contain:
- thousands of small streams
- numerous tributary rivers
- mountain headwaters
- lakes
- wetlands
- floodplains
- groundwater systems
- glacier-fed channels
- seasonal rivers
Watershed boundaries generally follow high ground.
A mountain ridge may divide two nearby streams into completely different river systems.
This means:
mountain placement must precede final watershed placement.
3. River Hierarchy
River systems form in stages.
A common progression is:
rill → creek / brook → stream → tributary → major tributary → trunk river → estuary or delta → sea / ocean
These categories describe hydrological relationship rather than mandatory naming convention.
A historically named brook may be larger than another culture's river.
A run may carry substantial mountain drainage.
Names reflect:
- geography
- local history
- culture
- settlement
- and tradition
as well as water volume.
4. Trunk Rivers
A trunk river is the principal river carrying the combined drainage of a major watershed.
A trunk river receives water from:
- tributaries
- smaller rivers
- groundwater
- rainfall
- snowmelt
- lakes
- wetlands
over enormous distances.
It therefore becomes progressively larger downstream.
The established principal example is:
the Ashrun River
The Ashrun should be treated as one of the major continental rivers of the Primary Continent.
It is not merely the river of Roaringwater.
Roaringwater is one settlement along a much greater river.
5. The Ashrun River
The Ashrun River is a major continental trunk river whose watershed extends across a substantial portion of the Primary Continent.
Its system begins in northern mountain country, gathers water from multiple upland regions, crosses the interior, receives major eastern and western tributaries, passes through Roaringwater, continues into the southern and southwestern lowlands, and ultimately empties into the western receiving ocean/basin.
Its broad hydrological structure is:
↓
northern snow-, spring-, and glacier-fed headwaters
↓
upper Ashrun
↓
multiple highland and mountain tributaries
↓
middle Ashrun
↓
↓
lower Ashrun
↓
western / southwestern coastal lowlands
↓
western receiving ocean/basin
The Ashrun is therefore one of the primary geographic spines of the currently developed continent.
6. Ashrun Headwaters — The Svartrheim Mountains
The ultimate headwater system of the Ashrun rises within the:
The Ashrun does not begin as one isolated spring.
Its upper watershed is built from many separate cold-water sources.
These include:
- glacier melt
- seasonal snowmelt
- permanent snowfields
- alpine springs
- mountain rainfall
- highland lakes
- numerous small streams
These waterways descend independently through upper valleys.
Over distance, they:
- join
- widen
- deepen
- collect additional tributaries
until a recognizable principal Ashrun channel develops.
This gives the Ashrun a broad northern catchment rather than one narrow source valley.
7. Upper Ashrun Tributaries
The upper Ashrun receives additional tributaries after leaving the primary Svartrheim headwater country.
At least one established cartographic tributary enters from mountain country south or southwest of the principal northern headwaters.
That contributing mountain system remains:
unnamed in current canon
and should remain unnamed until the master map establishes its geographic identity.
The tributary itself is likewise presently unnamed.
Its existence is nevertheless part of the Ashrun watershed structure.
This region demonstrates an important principle:
not every tributary requires an immediate proper name.
The river system may be geographically fixed before every local name is established.
8. Eldergreen and the Interior Highland Massif
The Eldergreen Forest contains an established interior mountain or highland massif corresponding to the small isolated mountain structure within the forested interior.
Its final Eldarûnian proper name remains unresolved.
It is not to retain the inherited designation Star Mounts.
Until formally named, it should be referred to in authorial geography as:
or:
the inner Eldergreen highlands
This is a working geographic designation, not necessarily an in-world proper noun.
The massif generates more than one drainage system.
9. Northern Eldergreen Tributary
One significant watercourse originates on or near the northern side of the Eldergreen Massif.
It flows outward through the northern Eldergreen region and ultimately joins the Ashrun.
This river is separate from the southern Eldergreen tributary.
Its final proper name remains unresolved.
Its presence establishes that Eldergreen is not hydrologically isolated.
The forest contributes substantial freshwater to the wider Ashrun basin.
10. Southern Eldergreen Tributary
A second significant river system originates on the southern side of the Eldergreen Massif.
Additional smaller woodland and foothill drainage joins it within or south of Eldergreen.
The river then travels generally southward and southwestward through the forest and lower country before eventually joining the Ashrun near Secumbra.
This tributary represents a major southern Eldergreen drainage corridor.
Its final proper name remains unresolved.
It must remain distinct from the northern Eldergreen tributary.
11. The Ashfang Drainage Fan
The Ashfang Mountains contribute far more water to the Ashrun watershed than one single river.
Their western slopes contain numerous:
- snowmelt channels
- springs
- mountain creeks
- steep runs
- minor tributaries
- regional rivers
flowing generally westward toward the Ashrun valley.
On the master map, this creates a recognizable:
Ashfang drainage fan
of west-flowing waterways.
Some may remain small.
Some may merge before reaching the Ashrun.
Several may ultimately receive proper names.
The established Grimvale Run–Shimmerbrook system is one important member of this larger drainage network.
It is not the only Ashfang tributary.
12. Grimvale Run
Grimvale Run is the established upper mountain reach of one major Ashfang tributary.
It descends from the western Ashfang high country.
Its water is supplied by:
- mountain precipitation
- springs
- seasonal snowmelt
- higher-elevation meltwater
Its upper course is characterized by:
- steep gradient
- cold water
- rocky bed
- narrow valley
- faster current
The Grimvale corridor functions as both:
- a river valley
- and a travel corridor
through the western Ashfang foothills.
13. The Shimmerbrook
As the Grimvale watercourse descends into lower terrain, it becomes known as:
the Shimmerbrook
The Shimmerbrook is therefore the lower continuation of Grimvale Run.
The name change reflects:
- geography
- settlement tradition
- local usage
rather than a break in the watercourse.
The hydrological relationship is:
Ashfang high country → Grimvale Run → Shimmerbrook
14. Shimmerbrook Flow Direction
The Shimmerbrook flows generally:
east to west
out of the Ashfang corridor toward Roaringwater.
The road between:
- Roaringwater
- Grimvale
- higher Ashfang country
follows this drainage corridor for substantial stretches.
This makes the Shimmerbrook both:
- a geographic feature
- and a travel-guide feature
within established narrative geography.
15. Roaringwater Confluence
At Roaringwater, the Shimmerbrook joins the much larger:
The Ashrun is clearly the dominant trunk river.
The Shimmerbrook carries the colder water of the Ashfangs into the broader Ashrun system.
This confluence is one of the defining physical features of Roaringwater.
Roaringwater is therefore properly understood as a:
major river-confluence settlement
rather than simply a town beside an isolated river.
Its location naturally supports:
- bridges
- mills
- wharves
- river trade
- warehouses
- road crossings
- fisheries
- inns
- caravan traffic
The meeting of river and road helps explain the settlement's importance.
16. Other Ashfang Tributaries
Multiple additional waterways descend westward from the Ashfang Mountains and enter:
- the Ashrun directly
- larger tributaries
- or local valley systems
before reaching the trunk river.
These are visible within the broader watershed structure and must be represented on the eventual map.
They need not all receive names.
The controlling doctrine is:
the Ashfang Mountains form a major eastern tributary source region of the Ashrun watershed.
Grimvale Run and the Shimmerbrook are important because the story follows them.
They are not hydrologically unique.
17. The Upper Ashrun Waterfall
Upstream and northeast of Roaringwater, the Ashrun passes through an established major waterfall or cataract.
This waterfall lies:
on the Ashrun trunk river itself
rather than upon the Shimmerbrook.
Its final proper name remains unresolved.
The falls indicate a significant change in:
- underlying bedrock
- elevation
- channel gradient
along the upper-to-middle Ashrun corridor.
This feature should remain on the master map.
Depending upon its eventual scale, it may affect:
- river navigation
- fish migration
- road placement
- portage
- local settlement
- milling
- trade
A navigable lower Ashrun does not require the entire river to be navigable above this cataract.
18. The Ashrun at Roaringwater
By the time the Ashrun reaches Roaringwater, it has already collected water from:
- the Svartrheim headwater system
- northern tributaries
- intervening highland drainage
- Eldergreen tributaries
- multiple Ashfang tributaries
It is therefore:
broad
mature
and:
high-volume
At Roaringwater, the local channel trends broadly:
westward
before the wider river continues into lower country.
This does not conflict with the river's larger south-to-southwest continental course.
Major rivers routinely bend according to terrain.
19. The Weeping Mire Basin
South of Roaringwater lies a broad lowland wetland system corresponding to the established:
The Weeping Mire is the principal homeland and power-center environment associated with the Black Coven.
Its supernatural and failure-state qualities overlay a geographically legitimate wetland basin.
The region is naturally suited to marsh development because of:
- low relief
- slow drainage
- standing water
- lake influence
- seasonal flooding
- groundwater
- river backflow
- fine sediment
This means the Mire existed as hydrologically favorable wetland country even before magical corruption, Coven influence, or scar-state transformation intensified its character.
20. The Mire Lake
A significant lake lies within or along the northern side of the greater Weeping Mire basin.
Its final proper name remains unresolved.
The lake collects water from:
- local rainfall
- wetland drainage
- small tributaries
- groundwater
- surrounding low country
The lake possesses an outflow river flowing generally west or northwest toward the Ashrun.
This outlet is an important tributary of the lower-middle Ashrun system.
Its current proper name remains unresolved.
21. Weeping Mire Outflow Tributary
The river draining the Mire lake ultimately joins the Ashrun downstream of Roaringwater.
This creates direct hydrological linkage between:
Weeping Mire → lake → outflow river → Ashrun
The relationship has important consequences.
Anything entering the Mire's water system may potentially move downstream through:
- tributaries
- lake water
- groundwater
- the Ashrun
depending upon:
- contamination type
- sediment behavior
- magical persistence
This makes watershed management especially important where Black Coven activity and magical contamination are concerned.
22. Lower Ashrun Tributary Junction
Farther downstream, the major southern Eldergreen tributary reaches the Ashrun.
The confluence occurs near Secumbra, whose settlement position is now a fixed cartographic control.
Secumbra is the established settlement name at this confluence and is no longer a provisional or unnamed location.
The confluence itself is geographically fixed.
Along the Ashrun road, Kilnstead lies southwest of Roaringwater and northeast of Secumbra, forming the established central-west settlement sequence:
Roaringwater → Kilnstead → Secumbra
This junction further increases:
- river volume
- navigability
- floodplain scale
before the Ashrun continues into the southwestern lowlands.
23. Lower Ashrun Course
After receiving the major southern Eldergreen tributary, the Ashrun continues broadly:
southwestward
through lower-elevation country.
Its course passes through or near:
- foothill margins
- agricultural lowlands
- road crossings
- expanding floodplain country
The river continues toward the western coast.
Its path may bend repeatedly.
The overall downstream direction remains:
toward the western / southwestern receiving ocean margin
24. Ashrun Mouth
The Ashrun ultimately empties into:
the western receiving ocean/basin
Formal assignment of the Ashrun mouth to Stormvault, Greywake, Sunreach, Frostcrown, or Southring remains pending until planetary basin orientation and final coastline geometry are locked.
The phrase “western receiving ocean/basin” is a working geographic descriptor only. It does not name a sixth formal ocean; final cartography must assign this coast to one of the five established ocean basins and, where appropriate, to a regional sea within that basin.
The final coastline will determine whether the Ashrun terminates in a:
- broad estuary
- delta
- tidal river mouth
- combination estuary-delta system
Given its size, the Ashrun should possess a substantial coastal mouth.
Its lower reaches may support:
- major ports
- wetlands
- fisheries
- shipping
- tidal influence
- fertile sedimentary land
The river must not terminate arbitrarily inland.
Its full system runs from the Svartrheim Mountains to the sea.
25. The Ashrun Watershed
The Ashrun watershed presently includes confirmed drainage from:
Northern Sources
- Svartrheim Mountains
- glaciers
- snowfields
- northern uplands
- unnamed mountain tributaries
Interior Sources
- unnamed western/interior mountain tributaries
- northern Eldergreen drainage
- southern Eldergreen drainage
- woodland runoff
Eastern Sources
- Ashfang Mountains
- Grimvale Run
- Shimmerbrook
- numerous additional west-flowing Ashfang tributaries
Southern Lowland Sources
- Weeping Mire basin
- Mire lake
- Mire outflow tributary
- lower-country streams
The Ashrun basin is therefore one of the largest currently established drainage systems of the Primary Continent.
26. Ashrun Watershed Skeleton
The controlling hydrological structure is:
↓
multiple glacial, snow-fed, spring-fed headwaters
↓
upper Ashrun
← unnamed mountain tributary systems
↓
middle Ashrun
← northern Eldergreen tributary
← multiple Ashfang tributaries
↓
lower-middle Ashrun
← Weeping Mire lake-outflow tributary
← southern Eldergreen tributary
↓
southwestern lowlands
↓
coastal floodplain / estuary or delta
↓
western receiving ocean/basin
This is now a hard cartographic watershed constraint.
27. Tributaries
A tributary is a river or stream that joins a larger watercourse.
Tributaries generally increase downstream discharge.
A continental trunk river such as the Ashrun naturally possesses:
- countless minor streams
- many small tributaries
- several important regional tributaries
- multiple major tributary systems
Not all require names.
A river should usually receive a proper name in the World Bible because it matters to:
- settlement
- navigation
- culture
- politics
- ecology
- narrative
rather than because every mapped stream requires a label.
28. Confluences
A confluence is the meeting of two waterways.
Confluences naturally attract settlement because they provide:
- water
- transport
- fertile soil
- crossings
- trade
- fisheries
- defensive geography
Roaringwater is the currently established major example.
The:
Shimmerbrook → Ashrun
confluence should remain one of the principal geographic anchors of the Primary Continent.
The downstream joining of the southern Eldergreen tributary forms another major confluence.
29. River Direction Doctrine
Rivers follow gravity and elevation.
They do not need to travel continuously in one compass direction.
A continental river may trend generally southwest while individual reaches run:
- south
- west
- southwest
- southeast
- northwest
for shorter distances.
Therefore the Ashrun's broad progression can naturally include repeated bends while maintaining an overall descent from:
northern / northeastern highlands toward the western-southwestern coast.
Elevation determines plausibility.
Compass direction alone does not.
30. Dagger River
The Dagger River is another established named waterway of the Primary Continent.
It is associated with:
The Dagger River is not currently established as a tributary of the Ashrun.
It should remain a separate river system until master topography determines otherwise.
30.1 Arrow Falls
Arrow Falls is built beside a substantial waterfall on the Dagger River.
The river therefore experiences a significant local elevation drop.
The surrounding geography must contain:
- higher upstream terrain
- resistant rock or similar geological control
- gorge or cataract geography
- lower downstream country
The falls create:
- constant mist
- strong river sound
- local humidity
- potential mechanical water power
and strongly shape the settlement's identity.
30.2 Dagger Tributary
An established Dagger Tributary also occurs within the Arrow Falls geographic system.
A bridge over that tributary forms part of local settlement geography.
The Dagger therefore possesses a genuine tributary network.
30.3 Dagger Basin Status
The complete Dagger watershed remains unresolved.
The final map must determine:
- source region
- tributaries
- downstream course
- destination
- whether it reaches ocean, sea, lake, or another trunk river
No connection to the Ashrun should be asserted until the map supports one.
31. Other Surface Rivers
The named rivers currently established represent only a tiny fraction of Eldarûn's actual freshwater geography.
A seven-continent planet necessarily contains:
- enormous equatorial rivers
- temperate trunk rivers
- glacial rivers
- desert rivers
- braided rivers
- seasonal rivers
- island rivers
- inland-basin rivers
These should generally be created after:
- elevation
- rainfall
- basin structure
- coastline
are known.
The river should emerge from geography.
The geography should not be bent arbitrarily around a desired river name.
32. Lakes
Eldarûn contains many forms of natural lake.
These include:
- glacial lakes
- tectonic lakes
- crater lakes
- volcanic lakes
- river lakes
- oxbow lakes
- alpine tarns
- freshwater inland seas
- saline lakes
- seasonal desert lakes
A lake may possess:
- one or more inflows
- an outlet
- no Surface outlet
- subterranean drainage
depending upon its basin.
33. The Weeping Mire Lake
The lake associated with the northern Weeping Mire basin is currently geographically established but not yet properly named.
It should not receive a final name merely for convenience.
Its eventual name should follow:
- regional history
- local language
- visual character
- settlement
- Black Coven influence
once the surrounding geography is more fully developed.
Its hydrological function is already fixed:
it drains toward the Ashrun through a western-flowing tributary system.
34. Blacklake
Blacklake is an established major water body of the Rootveil.
It is not part of the ordinary Surface river system.
Its hydrographic relationships belong to:
- Rootveil geography
- subterranean watersheds
- underground rivers
- deep aquifers
Its existence establishes that enormous inland bodies of water can exist within the deep world.
35. Floodplains
Large rivers naturally develop floodplains where terrain permits.
Floodplains may contain:
- fertile alluvial soil
- wetlands
- natural levees
- abandoned channels
- oxbow lakes
- marshes
- seasonal flood basins
These lands attract settlement because they are productive.
They also flood.
Periodic flooding is therefore part of ordinary Eldarûnian environmental behavior.
It does not require supernatural cause.
36. River Meanders
Low-gradient rivers commonly meander.
A mature river may slowly migrate across its floodplain over:
- decades
- centuries
- millennia
This can leave:
- abandoned channels
- oxbow lakes
- old riverbanks
- relocated ports
- buried settlements
A civilization may therefore remember a river course that no longer exists.
37. Waterfalls and Rapids
Waterfalls and rapids form where river gradient changes abruptly.
Common causes include:
- resistant bedrock
- fault scarps
- glacial hanging valleys
- canyon thresholds
- volcanic geology
Currently established waterfall systems include:
- the Ashrun waterfall northeast/upstream of Roaringwater
- Arrow Falls on the Dagger River
The Ashrun waterfall's proper name remains unresolved.
38. Deltas and Estuaries
Major rivers reaching the ocean commonly terminate through:
deltas
or:
estuaries
Delta
A delta forms where sediment accumulates and the river divides into distributary channels.
Estuary
An estuary forms where tidal saltwater penetrates a drowned river mouth and mixes with freshwater.
The Ashrun's final coastal form remains unresolved.
Either is physically plausible.
A mixed delta-estuary system is also possible.
The final decision depends upon:
- coastline
- tidal range
- sediment supply
- wave energy
- ocean current
- continental shelf geometry
39. Inland Drainage
Not every river reaches the ocean.
Some watersheds terminate within enclosed continental basins.
Such rivers may feed:
- salt lakes
- marshes
- playas
- evaporative basins
This drainage is especially common in:
- deserts
- rain shadows
- dry continental interiors
The eventual hydrology of:
may include closed basins.
That remains map-dependent.
40. Seasonal Rivers
Some waterways flow strongly only during certain seasons.
Possible triggers include:
- wet season
- snowmelt
- monsoon
- severe storms
Dryland streams may become:
- intermittent
- braided
- subterranean
- dry channels
during part of the year.
A seasonal river can still be:
- ecologically important
- culturally important
- dangerous during flood
41. Groundwater
Not all fresh water moves visibly across the Surface.
Groundwater occupies:
- soils
- sediment
- fractured rock
- aquifers
- limestone systems
It emerges through:
- springs
- wells
- wetlands
- riverbeds
- oasis systems
Groundwater is especially important in:
- deserts
- highlands
- cave regions
- agricultural basins
42. Karst and Underground Drainage
Where suitable soluble rock exists, Eldarûn may contain:
- caves
- sinkholes
- disappearing rivers
- underground channels
- springs
- natural bridges
A Surface river may disappear underground and emerge elsewhere.
Such behavior can be entirely natural.
It should not automatically be attributed to:
- magic
- Rootveil phenomena
- divine influence
unless canon establishes otherwise.
43. Surface–Rootveil Water Exchange
Surface hydrology and Rootveil hydrology can interact.
Water may descend through:
- caves
- deep faults
- fractured rock
- aquifers
Rootveil water may rise through:
- springs
- faults
- artesian systems
- caves
These connections can create:
- subterranean rivers
- deep lakes
- flooded caverns
- unusual springs
The exchange remains physical unless specific magical conditions alter it.
44. Rivers and Roads
Roads frequently follow river valleys because they offer:
- gentler slopes
- water
- natural passes
- settlement
- recognizable navigation
The established:
Roaringwater → Shimmerbrook → Grimvale Run → Ashfang
corridor demonstrates this relationship.
Road and river may separate where:
- gorge walls steepen
- marsh obstructs travel
- floodplain becomes unreliable
- terrain offers a better crossing elsewhere
45. Rivers and Settlements
Settlements commonly arise at:
- confluences
- bridges
- fords
- waterfalls
- ports
- river mouths
- navigable limits
Established examples include:
Roaringwater
A major settlement at the Ashrun–Shimmerbrook confluence.
Arrow Falls
A settlement built around a significant Dagger River waterfall.
Future settlement geography should generally demonstrate similar practical relationships.
46. Navigability
River size alone does not determine navigability.
Navigation depends upon:
- depth
- channel width
- current
- rapids
- waterfalls
- seasonal flow
- ice
- sediment
- bridges
The mature Ashrun around and below Roaringwater can support substantial river activity.
Its upper reaches above major falls and mountain country are not necessarily continuously navigable.
This creates natural:
- portage points
- transfer towns
- trade breaks
along the system.
47. River Trade
Navigable rivers naturally become economic corridors.
They may support:
- barges
- ferries
- docks
- mills
- warehouses
- markets
- fisheries
- timber transport
The Ashrun's size and continental reach make it an important potential north-interior-to-coast trade artery.
Final economic geography will depend upon:
- navigable reaches
- waterfalls
- roads
- political borders
- port placement
48. Watersheds and Climate
River discharge depends upon:
- rainfall
- snowfall
- glacier melt
- vegetation
- temperature
- seasonality
- evaporation
A river may carry water originating hundreds of miles away.
The Ashrun demonstrates this principle.
Its lower course can remain strongly supplied by northern and eastern mountain precipitation even when local lowland weather differs significantly.
49. Watersheds and Political Borders
Rivers often become political boundaries because they are visible and defensible.
Hydrological reality does not obey those borders.
One watershed may cross:
- kingdoms
- counties
- tribal territories
- religious lands
This can create disputes concerning:
- irrigation
- dams
- fishing
- shipping
- water diversion
- pollution
- magical contamination
A problem upstream may become a political crisis downstream.
50. Rivers and Ley
Ley Lines may intersect:
- rivers
- springs
- lakes
- aquifers
- wetlands
Water does not ordinarily flow toward a ley nexus instead of downhill.
Ley influence may alter:
- biological response
- magical material
- contamination
- local ecology
but hydrology remains physical.
51. River Contamination
Magical or failure-state contamination entering a watershed can spread downstream.
Possible consequences include:
- poisoned water
- altered fish
- dead vegetation
- magical residue
- unstable ley response
- contaminated sediment
This is especially significant for:
the Weeping Mire–Ashrun connection
because material entering the Mire's hydrology may ultimately migrate into the larger trunk river.
The exact extent depends upon the contaminant.
52. Floods
Floods occur when river discharge exceeds channel capacity.
Common causes include:
- prolonged rain
- intense storms
- rapid snowmelt
- glacier release
- ice-dam failure
- tropical storm remnants
- dam failure
Floodplains are naturally vulnerable.
Flooding should remain an ordinary environmental hazard.
53. Drought
During prolonged dry periods:
- tributaries shrink
- wetlands contract
- wells decline
- navigation becomes difficult
- agriculture suffers
Major trunk rivers with distant mountain sources may remain more reliable than purely local streams.
The Ashrun's broad catchment gives it greater resilience than many smaller rivers, although extreme multi-region drought could still affect it.
54. Watershed Mapping Doctrine
The master hydrological map should be constructed in this order:
- continental elevation
- mountain systems
- ridges and drainage divides
- climate and precipitation
- headwater channels
- tributaries
- trunk rivers
- lakes
- wetlands
- floodplains
- estuaries and deltas
This prevents physically impossible river networks.
The guiding rule is:
draw the land first; let the water tell you where it goes.
55. Established Ashrun Cartographic Skeleton
The current hard-locked Ashrun system is:
↓
many snow-, spring-, and glacier-fed headwaters
↓
upper Ashrun
← unnamed mountain tributaries
↓
upper/middle Ashrun
← northern Eldergreen tributary
↓
Ashrun cataract / waterfall
↓
multiple west-flowing Ashfang tributaries
↓
lower-middle Ashrun
← Weeping Mire lake-outflow tributary
↓
← southern Eldergreen tributary
↓
southwestern lowlands
↓
lower Ashrun
↓
coastal river mouth
↓
western receiving ocean/basin
This relationship is a hard cartographic constraint.
56. Named Surface Waterways Currently Established
The currently confirmed named Surface waterways include:
Confirmed but presently unnamed systems include:
- upper Ashrun mountain tributaries
- northern Eldergreen tributary
- southern Eldergreen tributary
- numerous Ashfang tributaries
- Weeping Mire lake
- Weeping Mire lake-outflow river
- Ashrun waterfall northeast of Roaringwater
These should remain unnamed until their proper geographic identities are deliberately established.
57. What Is Fixed
Ashrun
- major continental trunk river
- ultimate headwaters rise in the Svartrheim Mountains
- built from many mountain, spring, snow, and glacial tributaries
- drains a substantial portion of the Primary Continent
- receives tributaries from multiple upland systems
- receives multiple west-flowing tributaries from the Ashfang Mountains
- receives Eldergreen drainage
- receives the Weeping Mire lake-outflow system
- broad and mature by Roaringwater
- passes through Roaringwater
- local course at Roaringwater trends broadly west
- overall continental drainage trends generally south and southwest
- eventually empties into the western receiving ocean/basin
Grimvale–Shimmerbrook
- one specific Ashfang tributary system
- not the entirety of Ashfang drainage
- Grimvale Run is the upper mountain reach
- Shimmerbrook is the lower reach
- flows generally east-to-west
- joins the Ashrun at Roaringwater
- carries cold Ashfang water
Roaringwater
- major Ashrun settlement
- lies at the Ashrun–Shimmerbrook confluence
- river infrastructure and trade are geographically logical consequences of its position
Eldergreen
- contains an interior mountain/highland massif requiring an Eldarûnian name
- produces at least two major Ashrun tributary systems
- northern and southern drainage systems are distinct
Weeping Mire
- lies within a major southern lowland wetland basin
- contains or borders a significant unnamed lake
- lake/outflow drainage joins the Ashrun
- supernatural scar-wetland conditions overlay a naturally plausible wetland basin
Dagger River
- separate established river system
- passes through Arrow Falls
- forms the major waterfall associated with that settlement
- possesses at least one named tributary
- complete basin remains unresolved
58. What Remains Map-Dependent
The following remain unresolved:
- exact Ashrun source channels
- exact Ashrun total length
- exact Ashrun basin area
- final Ashrun mouth morphology
- exact named ocean or sea receiving the Ashrun
- final proper name and complete envelope/geometry of the Eldergreen interior massif
- names of the northern and southern Eldergreen tributaries
- name of the Ashrun waterfall upstream of Roaringwater
- names and hierarchy of additional Ashfang tributaries
- name of the Weeping Mire lake
- name of its Ashrun outflow tributary
- complete Dagger River basin
- Dagger River outlet
- all other continental river systems
- major lakes
- closed drainage basins
- deltas
- estuaries
- complete watershed divides
These are deliberate cartographic dependencies.
They should be resolved through the master topographic and hydrological map.
Foundational Principle
The freshwater doctrine of Eldarûn can be reduced to one statement:
Every river remembers every height above it.
The Ashrun remembers:
- snow in the Svartrheim Mountains
- rain on distant uplands
- Eldergreen's interior highlands
- meltwater from the Ashfang Mountains
- Grimvale Run
- the Shimmerbrook
- the waters of the Weeping Mire
- every lesser tributary entering it along the way
By the time it reaches the sea, it carries water gathered from a vast portion of the continent.
That is what makes a great river great.
Summary
Freshwater geography in Eldarûn follows coherent physical hydrology.
The principal currently established continental watershed is the Ashrun basin.
The Ashrun begins through a broad network of:
- glacier-fed
- snow-fed
- spring-fed
- rain-fed
headwaters in the Svartrheim Mountains.
These northern streams combine over distance into the principal Ashrun trunk.
As it crosses the continent, the Ashrun receives water from multiple additional geographic systems.
The interior Eldergreen Forest contributes at least two major tributaries originating around an as-yet-unnamed interior mountain or highland massif.
The Ashfang Mountains form a major eastern drainage source whose western slopes feed numerous tributaries into the Ashrun.
One of these is the established:
system.
Grimvale Run descends from the Ashfang high country.
Its lower course becomes the Shimmerbrook.
The Shimmerbrook flows west toward Roaringwater, where it joins the much larger Ashrun.
Roaringwater is therefore a major confluence settlement.
An established waterfall lies on the Ashrun itself upstream and northeast of Roaringwater.
South of Roaringwater, the Weeping Mire occupies a broad lowland wetland basin.
A significant lake within or along the northern Mire drains through an unnamed tributary into the Ashrun.
Farther downstream, the major southern Eldergreen tributary also joins the trunk river.
The Ashrun then continues through the southwestern lowlands before ultimately reaching the western receiving ocean/basin.
The complete controlling sequence is:
Svartrheim Mountains → Ashrun → Roaringwater → southwestern lowlands → western receiving ocean/basin
with major contributing systems including:
Eldergreen → Ashrun
Ashfang Mountains → Grimvale Run → Shimmerbrook → Ashrun
and:
Weeping Mire → lake → outflow tributary → Ashrun
The Dagger River remains a separate established watershed containing Arrow Falls and the Dagger Tributary.
Its larger drainage basin remains to be mapped.
The governing rule is:
Water follows the land, tributaries build the river, and the river carries the geography of an entire watershed toward the sea.
Rivers, Lakes & Watersheds
Full supplied entry, including any stated canon limits and open questions.