Questions tagged [basin]

a geomorphological term, meaning an extent or an area of land where all surface water from precipitation converges to a single point at a lower elevation.

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Problem with SAGA 9.2 Fill Sinks (wang & liu)

I don't know why when I use SAGA's fill sinks in QGIS the watershed basins are not generated, in SAGA GUI it works normally Versão do QGIS: 3.28.13-Firenze Código de revisão do QGIS: 3b4db4f561 Versão ...
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QGIS - The channel network and drainage basins are missing at the shoreline

I am new to QGIS, so I hope I have included enough information. My aim is to be able to determine, how much freshwater runs into the sea and where it enters the sea. I start with the original DEM file,...
GrumpyMum's user avatar
2 votes
2 answers
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Finding longest flow path in multiple basins at once using ArcGIS Pro and Spatial Analyst

In my watershed I have around 400 basins. I need to find the max flow length in each basin. The "Flow Length" tool creates the flow length for the entire watershed, not for each individual ...
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Basin code in Google Earth Engine

How to find 6digit in HYBAS_ID of "WWF HydroSHEDS Basins Level 7" database. Technical Documentation says that: Next 6 digits represent a unique identifier within the HydroSHEDS network; ...
user2955459's user avatar
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Finding Basin Length tool in Arc Hydro

I am following this tutorial on Arc Hydro and I couldn't find the Basin Length function in my Arc toolbox. On page 84, the tutorial says: Select Watershed Processing | Basin Length. However, I ...
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Layers can not be generated for Upslope Area tool in QGIS

I am using QGİS 3.18 Zürich version.Trying to delineate a river basin catchment. Lately, I followed following steps: Reprojected my DEMs Used SAGA 'Fill sinks (Wang&liu)' tool and obtained ...
Sena Odensoy's user avatar
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1 answer
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How to isolate cooling influence of green roofs from land surface temperature data? [closed]

The idea in summary is to use land surface temperature (LST) data as a means to draw cooling extents around green roofs, as if you were drawing watershed basins around a lake, where high temperature ...
LostinSpatialAnalysis's user avatar
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Clipping/Removing overlapping polygon drainage areas?

I have used the upslope command to create multiple drainage areas. Area1 is the entire basin, Area2 is a little smaller and overlaps Area1, Area3 is a little smaller and overlaps Area2, this continues ...
Chad's user avatar
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How to make ocean drainage map using Python [closed]

I'd like to make ocean drainage map like this: In particular I'm interested in Russia. A relatively explicit data source is hydrosheds.org, however from there i can get data to display only endorheic ...
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Selecting basins with discharge direction to East using ArcMap 10.3

I have watersheds shapefile created, some discharge their water to the east, others to the west. Is there is a way to automatically select the ones that discharges to the East using ArcMap 10.3?
Abdullah Nagy's user avatar
3 votes
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Obtain channel/stream network from a DEM in QGIS

This might sound like a basic question, but running SAGA's Strahler order won't do the job for me. The lengths of the streams look way too short and this is quite a mountainous area. The result makes ...
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Short streams and tiny basins | QGIS-SAGA

After watching a lot of tutorials and trying all approaches I still somehow manage to get streams that are too short over my DEM, resulting in very small basins. I do it the standard way: Get a DEM ...
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GRASS 7.8.3 problem with r.watershed and r.water.outlet

I need to find the basin of a small river and this is what I did: I found the drainage direction with r.watershed I used r.water.outlet to find the basin for the coordinates of the water outlet point....
Elena Aragona's user avatar
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Generating Basin Layer Using Hydrology Tool gives ERROR 010067

I am new to the hydrology tool in ArcGIS Desktop and I have been trying to generate basin layer from flow direction layer for a very large area using the Aster dataset. Every time I run the process, ...
Amarjeet Kaur's user avatar
3 votes
1 answer
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QGIS: How do I combine/summarize information from several attributes to one specific attribute?

I have a pretty specific question and I dont know how to approach this. I have a polygon layer for subbasins in the Danube area (HydroShed) which also contains information for water discharge. The ...
Alwin 's user avatar
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Watershed Delineation for Specified Streams

I have a set of streams (currently a shapefile (line)) which I need to delineate the watersheds for. I have attempted to use various QGIS tools, however, each tool I have tried is for delineation of ...
bob bob's user avatar
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Can QGIS produce Stage Storage Plan? [closed]

I work for an engineering firm. Can QGIS produce a stage storage plan for multiple drainage basins? I am attaching an image of what I am talking about. Currently, we use a combination of Autodesk ...
scohen's user avatar
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Getting higher stream number for lower order stream in ArcGIS Desktop?

The fourth order stream is showing greater stream number then third order stream?
prashant 's user avatar
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How to create an inlet drainage basin layer

Using a point layer of 8,375 inlets and a DEM, how do I create an inlet drainage basin layer with contiguous basins, each delineating water drainage for and into each inlet? I used an integer DEM, ...
mclemons's user avatar
1 vote
1 answer
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Extract polygon from stream line

I would like to delineate the polygon of a basin from an already delineated stream work. In the example, I want to extract an approximate polygon from the selected stream network in yellow without ...
Guido A. Herrera's user avatar
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How to calculate the distances to outlet along the flow path ?

I have created these raster files for a river basin: DEM Flow Direction Flow Accumulation I like to genereate a layer how it is shown in the picture below. I need the values for the distances from ...
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The resulting values are not what they indicate? [closed]

I am using ArcMap 10.3. When I create a watershed, using the Watershed tool in the Hydrology tool set, I am receiving values that should really be representing the number of water splitting lines, ...
mayada's user avatar
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1 answer
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Seeking outline/boundary (shapefile) of Ganges river basin? [closed]

I'm looking for an outline/boundary (shapefile) of the Ganges river basin. Where can I find this?
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Does r.stream.basin still exist? GRASS-QGIS2.18.7

So I'm following steps in another topic that seems to date to January of this year and is exactly what I want to do, here's the link: Get drainage basin of a polygon and at one of the last steps in ...
Louis's user avatar
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2 votes
1 answer
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drainage basin for whole lake QGIS 2.18.7

I am currently facing a problem. Over the past week, I have been initiated to hydrology within the GIS environment and have finally successfully generated water basins (using the GRASS r.water.outlet) ...
Louis's user avatar
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3 votes
1 answer
2k views

Selecting point to obtain water basin leading to it

For the past few days, I have been working on building a watershed model including drainage basins and find that I am not looking for a global watershed and basin distribution, I am looking to ...
Louis's user avatar
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3 votes
1 answer
282 views

Drainage basins ignoring lake

This is my first time writing in this forum and I hope this question offers some quality of information easing a solution. Here goes. I am new in analyzing hydrology with DEMs and I have followed ...
Louis's user avatar
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2 votes
0 answers
486 views

QGIS Multi-Basin Delineation (Pour-Point) Hydrology

I'm working on a QGIS plugin and struggling to find some existing QGIS processing functionally I could leverage. I need to replicate multi-basin delineation using pre-defined pour points. Specifically,...
Jpolly's user avatar
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-2 votes
1 answer
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Expression into the raster calculator to invert DEM

I've made a DEM from first pass LiDAR data which I want to invert and run watershed segmentation and basin delineation over in order to hopefully extract tree canopy outlines and heights - I'm newish ...
N-particle's user avatar
8 votes
1 answer
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Basin creation GRASS vs. flow direction

I have a strange behaviour in QGIS with GRASS tools. I am trying to create basins in the alp region and use he SRTM3 data. As I can see on the flow direction raster the SRTM3 data seems to act nice: ...
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