Search found 61 matches
- Thu Jun 10, 2021 3:38 pm
- Forum: Hydro
- Topic: Error reading location data
- Replies: 1
- Views: 12237
Re: Error reading location data
Thanks for your interest, and sorry for this inconvenience! I believe the issue is due to a location database bug that still persists in the Hydro GUI. County=New York & Place=New York has invalid data which is leading to the "Error reading location data" message and in-turn the other ...
- Tue Mar 02, 2021 12:30 pm
- Forum: Hydro
- Topic: Bulk Landcover Area
- Replies: 7
- Views: 80239
Re: Bulk Landcover Area
Hi Twan, Sorry for the trouble you're running into. To help us troubleshoot, would you please clarify the kind of error you get and exactly when it appears? For example, two errors you might get on step 2 that indicate different types of problems: A. When you try to press next, a small red triangle ...
- Fri Nov 13, 2020 2:21 pm
- Forum: Hydro
- Topic: Weather data inputs
- Replies: 4
- Views: 27256
Re: Weather data inputs
Matt, I've checked in with the weather preprocessor developer to get a clearer answer to your question. In the interim, I'll share that I was able to manually enter a year outside of the drop-down menu range and successfully preprocess weather and run it in Hydro+. Specifically, I clicked on the yea...
- Wed Nov 11, 2020 4:04 pm
- Forum: Hydro
- Topic: Weather data inputs
- Replies: 4
- Views: 27256
Re: Weather data inputs
Thanks for sharing that clarification and feedback Matt. Glad you were able to navigate compiling that program, despite a build error you needed to troubleshoot. To make this easier for other users, the weather preprocessor package now includes a compiled EXE, and the instructions above have been up...
- Thu Sep 24, 2020 2:41 pm
- Forum: i-Tree v6.x
- Topic: Hydro v6-beta Water Quality units labeled as kilograms while output is in grams
- Replies: 0
- Views: 39631
Hydro v6-beta Water Quality units labeled as kilograms while output is in grams
The Hydro v6 (beta) Graphical User Interface (GUI) has a bug in its pollutant loading output. The model's pollutant loading outputs are erroneously presented in grams while being labeled as kilograms, making them 1000x too high. The % change in pollutant loading is correct, but absolute values are 3...
- Mon Apr 27, 2020 9:15 am
- Forum: Hydro
- Topic: Does i-Tree use the Curve Number approach?
- Replies: 0
- Views: 38071
Does i-Tree use the Curve Number approach?
i-Tree does not use the Curve Number approach. Part of i-Tree Hydro's origin is as a process-based hydrology model alternative to Curve Number-based runoff models. If you'd like to learn more about i-Tree's hydrology engine, with specific interest in how it differs from Curve Number and handles subs...
- Tue Apr 21, 2020 5:47 pm
- Forum: i-Tree v6.x
- Topic: Hydro v6.3-beta Soil Macropore parameter misnamed "Percentage" but should be "Fraction", and has outdated default value
- Replies: 0
- Views: 40234
Hydro v6.3-beta Soil Macropore parameter misnamed "Percentage" but should be "Fraction", and has outdated default value
The Hydro v6.3.4 Graphical User Interface (GUI), Step 3 Hydrological Parameters, includes "Soil Macropore Percentage" as a parameter. That parameter has a range of 0.0000001–0.2 and a default of 0.000001. Here are two known issues with this parameter: Soil Macropore parameter units are act...
- Tue Apr 21, 2020 5:04 pm
- Forum: Hydro
- Topic: Errors when processing weather or stream data - what to do?
- Replies: 2
- Views: 19643
Re: Errors when processing weather or stream data - what to do?
Hello, The images on this thread are not visible, can you please re-attach them? Hi lalonde340, I've updated the original post's image links and have included the error examples as plain text. Please let us know if you still cannot see the error images or have any other feedback. Thanks and best wi...
- Wed Mar 11, 2020 3:40 pm
- Forum: Hydro
- Topic: [Advanced] Differences in sub-routines for Infiltration Rate Decay
- Replies: 0
- Views: 38919
[Advanced] Differences in sub-routines for Infiltration Rate Decay
In i-Tree Hydro there are two different routines available for estimating infiltration rate decay. The two different routines are listed below, along with the condition for which the i-Tree Hydro GUI would use each respective routine: Power Decay: used when a user-provided DEM is input for project t...
- Thu Apr 11, 2019 9:18 am
- Forum: Hydro
- Topic: Why is the ratio of pervious runoff to baseflow so different for my project in Hydro v5 vs. v6?
- Replies: 0
- Views: 43207
Why is the ratio of pervious runoff to baseflow so different for my project in Hydro v5 vs. v6?
We've found various cases where a project run in v5 vs. v6 varies significantly in how each allocates baseflow and pervious flow. This can also result in slightly different total flow estimates. In all cases so far, we've found that the issue is that the project inputs are not identical in these com...
- Tue Mar 26, 2019 10:31 am
- Forum: Hydro
- Topic: Instantanious vs Continuous variables, or Why are some advanced output variables very different orders of magnitude?
- Replies: 0
- Views: 41043
Instantanious vs Continuous variables, or Why are some advanced output variables very different orders of magnitude?
Note that some of these Advanced Output variables are instantaneous whereas some are continuous . For example, interception by vegetation is an instantaneous variable, reset at each timestep and only representing the water engaged in that process at each individual timestep; storage on vegetation is...
- Mon Mar 04, 2019 3:44 pm
- Forum: Hydro
- Topic: Why did total flow go down when impervious cover went up? (Troubleshooting unexpected results)
- Replies: 0
- Views: 43051
Why did total flow go down when impervious cover went up? (Troubleshooting unexpected results)
There's a few things to look for when counter-intuitive results come up. This FAQ shares a response to a user who asked why total flow was decreasing in the scenario that increased impervious cover, along with other information and explanation that has helped clarify unexpected results. --- How has ...
- Thu Oct 11, 2018 1:07 pm
- Forum: Hydro
- Topic: What is the differece between pervious flow, impervious flow and baseflow?
- Replies: 0
- Views: 63727
What is the differece between pervious flow, impervious flow and baseflow?
The model estimates total streamflow using three flow components: pervious area runoff, impervious area runoff, and baseflow. Pervious runoff is surface flow generated by infiltration or saturation excess flows. Infiltration excess flow is generated when the amount of water attempting to infiltrate ...
- Tue May 29, 2018 1:12 pm
- Forum: i-Tree v6.x
- Topic: Hydro v6.1.1-beta Preprocessed weather files not accepted due to 1 missing record
- Replies: 0
- Views: 45160
Hydro v6.1.1-beta Preprocessed weather files not accepted due to 1 missing record
In Step 1) Project Area Information, users can enter preprocessed weather data files, but Hydro v6.1.1-beta is rejecting normally-acceptable preprocessed weather files because of a minor formatting issue. The error presented to users is that the weather files they input do not match the project peri...
- Tue May 29, 2018 1:01 pm
- Forum: i-Tree v6.x
- Topic: Hydro v6.1.1-beta Precipitation values differ between preloaded weather & equivalent raw NCDC data
- Replies: 0
- Views: 44396
Hydro v6.1.1-beta Precipitation values differ between preloaded weather & equivalent raw NCDC data
We notice that in a few test cases, in Hydro v6 preloaded weather data differs slightly from equivalent raw weather data users obtain on their own. This bug only affects the weather data input and the rest of the estimates continue working fine with either source of weather data. Given i-Tree Hydro ...