Tagged Questions

A suite of tools developed by Esri to facilitate the creation, manipulation, and display of hydro features and objects within the ArcGIS environment.

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1
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0answers
13 views

Attach attribute information to stream links

How can I attach related attribute information to individual segments of a stream?
0
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0answers
9 views

Difference of Archydro and Hydrology Between [duplicate]

What are differences between archydro and hydrology tools? What does ArcHydro add on hydrology tools?
-1
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0answers
14 views

Stream Links on Topography [closed]

I create stream link using ArcGIS. How can I understand stream links corresponds at terrain where they are?
1
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1answer
28 views

Digital Elevation Model Resolution

While I creat flood areas using DEM in ArcGIS, Which parameters do I consider to determine DEM's pixel size and resolution?
1
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2answers
44 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 ?
2
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1answer
19 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 ...
3
votes
0answers
34 views

How to perform mass-balance analysis with ArcHydro

I was wondering if there is any online manual/instruction for carrying out water mass balance analysis using ArcHydro? I have searched for such information, and the closest thing I can find is a ...
3
votes
1answer
80 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 ...
1
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2answers
46 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 ...
0
votes
0answers
14 views

-1 value in NextDownId attribute in drainageline

I'm currently working on adjoining catchments in Arc Hydro Tools and I have noticed that there are catchments that are not adjoined. I checked all the generated datasets and found out that the ...
2
votes
0answers
36 views

Determine inflow outflow of polygon based on flow accumulation

I'm working with ArcGIS 10.2 to try to determine if a given site has some sort of outflow for the water coming into the site. I'm using the ArcHydro tools and have calculated the flow direction and ...
2
votes
1answer
56 views

Watershed Analysis

I am performing watershed analysis using Archydro tools in ArcGIS10. After calculating all flow direction, accumulation, drainage network when I perform watershed delineation, it gives me the same ...
1
vote
1answer
58 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 ...
1
vote
1answer
60 views

Using rainfall data (raster) as an input to determine stream lines in Arc Hydro?

I was wondering if it is possible to use rainfall data (raster) as an input to Arc Hydro for determining stream lines? I am learning Arc Hydo and have gone through a couple of tutorials. As far as I ...
0
votes
0answers
48 views

Striping Artifact in Aster DEM Mosaic

I'm working with SRTM and ASTER data for a university project. My goal is to delineate watersheds and evaluation of these with ArcGis 10 and ArcHydro. But a striping error occurs with the flow ...
1
vote
1answer
81 views

Creating weight raster for flow accumulation in ArcGIS for Desktop?

I am studying flood flow using ArcGIS for Desktop. When creating flow accumulation in hydrology, there is a weight raster. However, İf you do not have it, the programme sets its value to 1 which is ...
2
votes
2answers
138 views

What is Login to Esri FTP site for Arc Hydro Tools?

Esri used to have a forum sticky that contained the login instructions to the FTP site for the Arc Hydro tools. They have since deleted all of their forums. Does anyone know the login instructions ...
1
vote
0answers
62 views

Errors recognizing ArcHydro 2.0 and ArcGIS 10 when calculating ServiceSheds with InVEST HelperTools

after validating arguments, creating output folders, setting script variables, and checking DEM properties, the Create ServiceSheds tool from InVEST Helper Tools is telling me that ArcGIS10 and ...
2
votes
0answers
58 views

Measuring distance between discharge point, along river, until next intersection with another river?

i hope someone can answer me my simple question. I have two sets of data a river network --> line feature discharge points along those rivers --> Point Data The discharge points represent ...
1
vote
1answer
80 views

Managing large number of catchments/watersheds

Does anyone know of an easy way to manage a large number (10,000's) of catchments/watersheds? I have defined a stream network and for each segment, I have a corresponding catchment (in a unique ...
2
votes
0answers
75 views

ArcHydro Batch Subwatershed Delineation doesn contain catchment boundaries/falls short

When running the Batch Subwatershed Delineation in ArcHydro for 10.2/10.2.1, many of the output subwatershed areas do not completely enclose the catchments/adjointcatchments they are are representing. ...
1
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0answers
57 views

Determining average rainfall for cumulative watershed, where only sub-watersheds defined?

I have a polygon layer with sub-catchments (sub-watersheds) and a grid of rainfall. I have used the Zonal Stats as a table to calculate the average rainfall for each sub-catchment, but I now need to ...
2
votes
2answers
450 views

Arc Hydro 2.0 for use with ArcGIS 10.1 (or later) for Desktop?

I have ArcGIS 10.1 for Desktop and the toolbox of Arc Hydro 1.1 beta. I want to find and donwload the Arc Hydro 2.0 for use with ArcGIS 10.1 for Desktop but, after research on the net, I cannot find ...
1
vote
1answer
293 views

Fill sinks error in arcHydro

I am working on a project that is modeling runoff at a county level. The DEM used is lidar derived and has a 5 ft resolution. The general workflow I am flowing is Sink evaluation Sink Selection (to ...
1
vote
1answer
95 views

empty file geodatabase error (nowhere feature class)using arcpy [closed]

i want to import a python(2.7) script to arcmap 10.1 my script has 2 inputs variables one for workspace and another raster dataset and i want o convert input raster as feature class polygon . i want ...
-2
votes
2answers
2k views

How to avoid ImportError: No module named arcpy causing Failed to execute (Script) error?

I have a proplem with arc hydro in arcpy,i want to create a simple script where automated some tools from archydro in arcpy.. I use arcmap 10.1 and python 1.7,my import is one dem and my export is a 6 ...
0
votes
1answer
72 views

automatic save outputs variables in the folder workspace using pyhon for arc map 10.1

I want to create python script with aim to import him in environment arcmap 10.1 and to make a hydrologic analysis because the scipt meybe can have many outputs raster file or feature class would ...
1
vote
1answer
82 views

How to use ArcMap for HydroPower Potential

I am trying to determine the sites for small hydropower. I have a elevation dem, rainfall data, Curve number data (from soil and landuse shapefiles). I have already used the DEM to fill sinks, find ...
7
votes
1answer
230 views

Hydrology toolbox versus Arc Hydro toolbox?

I would like to do some watershed delineation research/development (at the County level) with our LIDAR generated DEM, after it is corrected, but am wondering what, if any, differences might result ...
0
votes
2answers
51 views

Polygon Data to Fit Raster

I'm working with an NHD Flowline of streams and rivers in NC, and I'm trying to only retain the ones in the raster. I tried to convert to the raster to a polygon and was going to clip them, but in the ...
2
votes
0answers
167 views

How to run Arc Hydro in ModelBuilder?

I tried to run a ModelBuilder program but it gave the error below. I am working in ArcMap 10.2, windows 7 64 bit pro and the raster format is Grid. When installing ArcGIS 10.2, it required me to ...
1
vote
1answer
173 views

How to get additional subbasin areas designated by points in the river network?

Update 14/1/9:I follow this post:Watershed and Stream Network Delineation, and here's my workflow: use Batch Point Generation to create batch points related to designated points(green dots) Batch ...
7
votes
3answers
374 views

How to get the subbasin area of each specified river segment?

I have a DEM file of one district, and I have used those following tools in spatial analyst tools in ArcGIS 10.1 to get files related to the original DEM file: Fill Flow direction Flow accumulation ...
3
votes
2answers
196 views

Delineating catchments upstream of flow sites [duplicate]

I have many flow sites and I used them to delineate catchments upstream of each flow site using Spatial Analyst Tools > Hydrology > Watershed. As you know using this tool, you'll get the catchments ...
1
vote
2answers
337 views

Calculating watershed runoff with landuse and rainfall data?

What is the method for computing rasters of total rainfall of a given month, flow accumulation, and land use (runoff coefficient) or soil K factor? I am using ArcMap 10.
4
votes
5answers
362 views

Stream network doesn't match the reality?

I am trying to create flow accumulation grid in ArcMap using Arc Hydro. I have the DEM (25mX25m) and the stream network shapefile. I have done the following 1)Resampled the DEM to 5m; 2)Burnt the ...
1
vote
1answer
315 views

How to run a shortest path analysis for DEM-derived streams and pour points?

I have a .shp for streams and another for pour points. Those features were extracted from a DEM by using the Hydrology package from the Spatial Analyst Tools of ArcGIS 10. I want to know the distance ...
1
vote
0answers
138 views

ArcHydro: Flow Accumulation 863988034 Cells

I've been using Arc Hydro for the last 7 years to determine catchment characteristics. I'm currently setting up a new model to determine structure locations along a proposed railway alignment. This is ...
5
votes
1answer
411 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 ...
4
votes
5answers
1k views

Calculating Runoff / Streams using DEM in ArcGIS

I am just curious about the workflow that many of you use for runoff/stream analysis using a DEM and create a "water network" from the results in ArcGIS 10.1? I know the average rainfall for different ...
1
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0answers
435 views

SCS curve numbers for rainfall-runoff model using ArcHydro

I'm trying to assign curve numbers to one of my subbasins using ArcHydro (subbasin parameter from raster) following a tutorial as you can see here: when I turn to the step after generating my own ...
2
votes
2answers
1k views

Error running ArcHydro tools function in Arcmap

I am trying to run a function from ArcHydro tools in Arcmap 10.1; Sink evaluation. But before it can finish it returns an error message, that, frankly, I don't understand at all. It goes ...
1
vote
0answers
102 views

When should I merge two or more sub-basins into one?

I've been using Archydro to analyze one of the unknown hilly regions with many watersheds. Unfortunately, ArcHydro generates so many sub-basins that it looks really unrealistic and weird. However, I ...
1
vote
1answer
131 views

Determining Pixel-by-pixel Catchments in ArcHydro

I used ArcHYDRO to prepare HydroDEM (5m) without sinks, Flow direction (FDR) raster, flow accumulation raster (FAC). As I understand FAC, value of pixel shows number of pixels that contribute to this ...
5
votes
1answer
91 views

Global Basin Delineation Across Dateline

I'm trying to delineate all river basins on a global 1/16 degree grid. The algorithm that the Basin tool in the Spatial Analyst Toolbox works well (fast) except it doesn't know how to handle the ...
1
vote
0answers
26 views

Can I burn stream network into DEM using DEM layer only? [duplicate]

Possible Duplicate: How to ‘burn’ a stream network into a DEM layer in ArcGIS 10? I am doing hydrology modelling and I want to calculate the run-off. In order to do that,the model which I ...
1
vote
0answers
250 views

system runtime error from ArcHydro [duplicate]

I am getting the below error during execution of archydro. "system runtime interoperservices com exception (0x80004005): error HRESULT E_FAIL" I tried all options available on internet to solve this ...
3
votes
4answers
4k views

How to calculate for every basin/sub-basin, drainage area at every elevation contour along stream?

With DEM as source, I created all necessary files like flow direction, accumulation,slope,streams,watersheds,pour point etc.... In my watershed(basin), I have many sub-watersheds(sub-basin) with ...
5
votes
5answers
3k views

Volume of water in basin with reference to incremental height of DAM?

I have a DEM of my area. I did watershed analysis with Arc Hydro. I want to calculate "Volume of water in a basin with reference to incremental height of DAM" Is there any method, tool to give ...