Questions tagged [catchment-area]
An area of influence defined by boundaries related to distance. In human geography, this area is defined as the location from which customers or visitors are attracted. In hydrology, this area defines the location within watershed boundaries (also known as a drainage basin).
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Drainage area at a point of my choice
I want to get drainage areas at specific points (the points are places I want to put culverts for a railwork construction).
The thing is that when I run either upslope area or PCraster tools, the ...
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How can I define an Area of Interest a certain distance from a set of coordinates on the Web Soil Survey website?
I'm trying to help automate a sequence of actions that involves downloading soil data for a specific area of interest at https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx. The tool allows ...
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Setting boundary condition for urban catchment flow direction operation
I am trying to delineate individual catchments for a large number of kerb inlet pits from a LiDAR DEM using open source tools (QGIS, WhiteBox).
In areas where the LiDAR has sampled verge elevations to ...
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QGIS: Further subdivide sub-catchments based on DEM
I have a DEM and a vector layer with existing hydrological sub-catchments. Is there a way in QGIS to further subdivide the sub-catchments based on the DEM?
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QGIS - Upslope Area Function - Error
I am try to create map that shows the catchment of my reserach area. I already created the steams and related basins. Further, I would like to delete the basins that are not related with my catchment ...
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QGIS Catchment Creation from existing line shapefile (streams)
I understand the general process of creating a catchment.
Get DEM data Fill sinks
Build stream network
Create a line shapefile of the stream network
Choose outlet location and obtain coordinates
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Create non-overlapping isochrones / service areas from points
In QGIS I have a point layer of approx. 50 points around a city that represent the on ramps to- and exits off the highway. I would like to calculate the isochrones / service areas of each individual ...
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Calculating areal distribution of soil types within catchment layer in QGIS
I have two polygons:
Layer with +100 river catchments
Soil type layer (8 different soil types)
I want to calculate the areal distribution of soil types within each river catchment. Areas should ...
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Calculating population in catchment area in QGIS
In QGIS 3.22.0 (Biatowieza) by means of the "OpenRouteService" Plugin I was able to get isochrones for my point layer.
The "ORS Tools" Plugin calculates the population within the ...
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Remove inner boundaries in merged vector layers
I am using QGIS and the GRASS plugin for a watershed analysis where I would like to merge three small natural catchments into a larger one.
I used the 'Merge Vector Layers' function (under the 'Vector'...
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Have voronoi take into account line boundaries (such as rivers, highways...) (on Qgis 3.14)
I have points locating supermarkets. I would like to use the Voronoi method to automatically delineate the catchment area of each supermarket (in real life of course it overlaps a bit on each other ...
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Calculating walkable catchments from polygons [closed]
I am working in QGIS, and I would like to calculate 400 m walking catchments from a set of parks (polygons).
At the moment I have:
Parks Layer (polygon)
Urban Grid layer, which shows publicly ...
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Delineating multiple nested catchments in R whitebox; prevent primary catchment from being cut by subcatchment
I am using whitebox tools in R to delineate catchments. I have 150 lakes in a rather small area so many of the lakes are within the same catchment.
I use
wbt_watershed(d8_pntr = ptr,
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Hydrological catchment area for a road segment (QGIS)
I try to calculate the hydrological catchment areas for road segments in a mountainous region in QGIS. As far as I see, I can only calculate watersheds in general or for particular points. Is there a ...
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Upslope area shows an error stating tool needs graphical user interface
I tried delineating catchment area of a place. First I downloaded the DEM TIFF from internet. Then reprojected it to the required CRS. Then I used the Fill Sink tool and Strahler Order after that. ...
