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4
votes
3answers
367 views

How to find the watershed for each outlet point and sum values within it?

I have the following files to work with: Stream network of a basin; Outlet points for each segment* of the network and Points which represent water withdrawals along of the stream, which are not ...
4
votes
1answer
35 views

How far is a station from the outlets in a watershed

I have a gauging station point with elevation. Also have a watershed generated for the same area. I just want to know how to calculate the distance from the station to the outlet(point) The green ...
3
votes
1answer
298 views

Water Flow Analysis

If I know that 10,000+ gallons of water were going to be dropped at a single point how could I model where it would flow. I would prefer something that worked in ArcGIS and could create a layer. ...
3
votes
2answers
157 views

How to find out the Basin Length?

I am doing Project on Drainage basin, to find out the Elongation ratio I need to find out Basin length, Can any one of you tell me how to find out BASIN LENGTH using ArcGIS or any other way. My data ...
3
votes
1answer
48 views

Watershed delineation taking into account lake/reservoir

My watershed has several big lakes. When I delineated my watershed, I had some unwanted subwatersheds and river segments inside the lakes (see fig. below). I want to tell ArcGIS/ArcHydro to delineate ...
3
votes
2answers
303 views

How to find out the Stream Order from DEM

I have DEM Data for the study area, I want to know how to find out the stream order using DEM. I saw Stream order tool in Hydrology toolset in ArcGIS. in Stream order tool what is input stream raster ...
2
votes
1answer
71 views

Watershed extraction using different DEM tiles

I would like to extract the watersheds for a particular area using QGIS. However, I only have Aster 30m DEMs to work with, each tile covering one degree square. The problem is that I need to use ...
2
votes
1answer
101 views

Inland / crater watershed delination

Even though watershed delineation is a quite popular matter here, I have what seems to be a somewhat unusual demand. I start with a DEM which is constituted of a series of craters, all centered on ...
2
votes
1answer
571 views

Automatic Watershed Delineation

I am trying to delineate watersheds automatically using Arcgis/Achydro. I got the drainage area contribution of stream segment (part of stream) as shown in figure stream. The corresponding drainage ...
2
votes
0answers
148 views

GRASS GIS - r.water.outlet - What is my mistake?

I'm new to GIS - more so in GRASS GIS. I installed GRASS GIS 6.4.3svn in my Windows 7 machine. No problem in installation. Downloaded SRTM-Geotiff file Location, Mapset all o.k Used r.in.gdal to ...
1
vote
0answers
21 views

How to join two fields after calculating ?

I have been working with two layers and I am trying to join them and turn them into a raster data. The first layer is a watershed layer which I have assigned each shed a location from the center point ...
1
vote
1answer
65 views

Watershed Analysis using DEM [duplicate]

I stumbled upon your question regarding the mosaic feature in qgis, the thing is I'm also using Quantum and this is my first encounter with GIS this semester, so if you can please help me with a ...
1
vote
0answers
120 views

Extraction of stream gradient for branched river networks

At the moment I am working on the extraction of stream gradients for a large basin, as a consequence, rivers are strongly branched.So far, I read through the relevant posts on this site, but so far I ...
0
votes
1answer
41 views

How to find the watershed area for each point in the river network？

As title, I want to find the watershed area, but using QGIS. I have following files to work with： stream network shapefile(polyline) point shapefile clipped from the polyline shapefile I want to ...