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Questions tagged [stream-order]

A method of classifying the relationship between segments of flowing water bodies.

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21 views

Include dam in DEM based stream burning

I am about to include many dams inside a watershed into the stream burning process. The raw input is NHDPlus flowline with the stream order information (VAA). Because NHD has too many flowline, we ...
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30 views

What interior watershed basin means in GRASS GIS?

I am not sure of the definition of exterior and interior watershed basin. The definition given by the documentation is not very clear : Basin threshold The minimum size of drainage basins, defined by ...
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78 views

Not able to dispaly large shapefiles

I have a large stream vector file (6GB) which contains four files (shp, prj, shx and dbf) all located together. I cannot display in QGIS. I get this error message from QGIS: The shapefile is not valid ...
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309 views

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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1answer
48 views

How would I process and output every possible route of a stream network?

Starting with a stream network, I would like an output that includes every possible route from the lowest level stream to the highest level river as separate lines. Is this possible? I am using QGIS. ...
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287 views

Strahler Order Error

I'm using QGIS (Zanzibar) for a project in my university and that includes finding the stream order and some shape parameters. So I tried using the strahler order to calculate the stream orders and ...
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34 views

How to train or calibrate stream flow accumulation using observation data?

I need to calculate flowrate at designated coordinates (Point of interest - POI) in a watershed. I have real-world data from stream gauge stations along this watershed for each 50-150 km2 rainfall ...
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549 views

Fill sinks and Strahler Order error in QGIS

I am working on a DEM of a watershed with a geotiff file size of 35GB. I am trying to execute watershed analysis tools and am experiencing errors in doing so. I attached a screen cast for Strahler ...
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139 views

Calculate stream locations and Strahler order from DEM in QGIS

I am trying to locate streams and determine their order in QGIS. I have tried using several of the procedures described in answers to similar questions, but none of them seem to work. I have filled ...
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45 views

Creating a "Stream Order" of canal system using ArcMap

I'm interested in creating a "Stream Order" for our canal system. I am the GIS Specialist for an irrigation district. I would like to have the ability to have a layer for when I click on a section of ...
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1answer
309 views

Simplifying stream network based on grid using QGIS?

I have a river network (blue line in the below image) and I need to simplify this based on a grid. I basically need to snap the river to the closest vertex or middle-of-side of the grid cell's bounds (...
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68 views

Getting higher stream number for lower order stream in ArcGIS Desktop?

The fourth order stream is showing greater stream number then third order stream?
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221 views

How to use GRASS command "r.stream.distance" in Qgis 2.16.2?

I like to figure out the distance from each cell to the outlet along the flow path. Maybe you can suggest some other opportunities/commands to solve my problem. It would be nice, if someone can help ...
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1answer
241 views

Find the nearest point on a stream network from a given point?

I have a vector layer for stream network created by r.stream.extract and then vectorized stream file using r.to.vect of grass algorithm in qgis. I want to find nearest point for a given point on ...
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1answer
823 views

How to know stream order in QGIS on output of r.stream.extract

I have stream order created over DEM using r.stream.extract , which gives 3 output files: stream_raster - raster map stores extracted streams. stream_vector - extracted points for each stream ...
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1answer
149 views

Dissolve Lines without Dissolving Convergent Lines?

I've been playing with arcHydro and related processes a bit and have run into an obstacle. I have been creating stream networks from the flow accumulation, direction, and stream order functions. When ...
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2answers
1k views

QGIS: Saga Channel network: how to prepare SRTM data

I am trying to use the Saga toolbox (2.2.3) in QGIS (2.18) to create a channel network from SRTM data using this tutorial 1. It works, but the result I get when using the DEM that comes with the ...
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1answer
99 views

Flow direction without DEM / raster

I am trying to figure out flow direction for a stream network and I do not have a high resolution DEM data for the same. I only have information about the stream orders and the network itself. Is ...
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1answer
3k views

Making River/water map with stream order in QGIS?

I'm a complete novice. I am using QGIS but am open to trying anything else. I am trying to make a map like the example at http://www.hydrosheds.org/. HydroSHEDS provides void filled elevation, ...
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1answer
533 views

what is the stream order coming to next given map

I am following Strahler's method for stream ordering. Is the green colored stream 4th order, according to this method?
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1answer
154 views

Connectivity of Streams

I have a line vector layer containing streams (see image below). What is the easiest approach to determine the connectivity of each stream segment (eg. sum of upstream nodes)?
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138 views

Automatically selecting main rivers of very branched river network using Arc Hydro? [closed]

I'm using ArcGIS 10.1 for Desktop and Arc Hydro. Is there any way to automatically select the main rivers of a very branched river network?
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0answers
876 views

How can we extract the stream order branch?

Actually I am new to GIS, so I don't know much about technical terminology. I have extracted a river network but now have a problem in distinguishing the branch order of stream (from order 1 to 2, 2 ...
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1answer
2k views

Automatically generating pour points along stream network?

The following screenshot shows the results of a water flow analysis where I identified stream order via the Strahler method in ArcGIS. Now I need to generate watersheds for 2nd order streams and ...
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1answer
177 views

Shreve Stream Order - labels

I am working on Shreve stream order. I made raster where is basin with rivers. I created Shreve stream order but problem is that I should put labels to map, but I don't know how (only putting text ...
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1answer
262 views

How to join multiple lines (branches of a large stream network)

I've generated a channel/stream network based on a DEM, but each branch of the network is split into very small lines. I'd like to have the network divided into as few separate lines as possible, so ...
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1answer
5k views

Creating Stream Order [closed]

I'm new user of this software, please can somebody guide me, how to calculate stream order in QGIS or GRASS GIS, step by step.... mean commands and how to calculate watershed in this.
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1answer
975 views

Horton Stream Ordering in ArcGIS?

Is there a way to order streams using the Horton (opposed to Horton-Strahler) method in ArcGIS (10.2.2)? I know the Stream Order tool allows you to use Strahler and Shreve.
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2answers
417 views

Creating Stream Order with using thresholding

While creating stream network, I implement a thresholding. All cells's value is "1". Later, while creating stream segments, Do I use the second thresholding for separating link to segments ?
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1answer
198 views

Creating Stream Order

All of cell's values are "1" into stream network. Later, stream link seperates the segments using stream order tool. And, each stream segment has different grid codes. How do Stream Order discriminate ...
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2answers
1k views

Stream Segmentation in ArcGIS

When I create a stream segmentation using Archydro,“Fdr” and “Str” are the inputs for the Flow Direction Grid and the Stream Grid respectively. The output is the Link Grid. How is defined considering ...
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2answers
4k views

Create stream network using ArcGIS

When I create stream network in ArcGIS, for example, if there is a cell of more than 100 flowing into that, it assumes stream. Does ArcGIS decide to cells more than 100 or 80? If I decide, what are ...
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1answer
2k views

How to derive stream order from vector network [duplicate]

I have a recently-updated extract from NHD High Resolution (updated in last 6 months) which means it hasn't been cranked through NHDPlus, and won't for many years to come, and thus has no Stream Order ...
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1answer
277 views

How are minor tributaries determined?

What are the criteria to determine if river A is a major or minor tributary to another River B? Is stream order the only deciding factor i.e. the highest order is the main stem, one less order is a ...
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2answers
1k views

Installing NVS Vector Stream Tool with ArcGIS Desktop version later than 10.0?

I can't seem to get a response form NVS about their Vector Stream Tool add-on, but they did send me a fixed-up version that I have now been able to install. However, I cannot find any associated ...
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2answers
8k views

Finding Stream Order from DEM using ArcGIS Desktop?

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 ...
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2answers
7k views

How to calculate stream order for vector data without a DEM? [closed]

I have a shapefile which contains the streams that were digitized from a satellite Image. I would like to calculate the stream order for this data. The data does not exactly match the DEM that I have, ...