Search found 61 matches
- Thu Jan 14, 2016 12:31 pm
- Forum: Hydro
- Topic: How do avoided runoff estimates differ in Eco and Hydro?
- Replies: 0
- Views: 18731
How do avoided runoff estimates differ in Eco and Hydro?
i-Tree Eco estimates runoff using precipitation derived from the weather year & location set by users in Project Configuration, along with a simplified i-Tree Hydro simulation. In this simplification, other than tree cover, land cover is set as either pervious or impervious based on averages for...
- Mon Jan 04, 2016 4:11 pm
- Forum: Hydro
- Topic: How does i-Tree Hydro handle snow?
- Replies: 0
- Views: 18012
How does i-Tree Hydro handle snow?
There are specific processes we need to consider for hydrology in locations with most precipitation coming in the winter, frozen. In the version 2 update of i-Tree Hydro, the underlying model was improved to include cold climate hydrology routines in the form of 4 processes: snow interception; snow ...
- Fri Sep 11, 2015 9:46 am
- Forum: Applications and Utilities
- Topic: Avoided runoff - ECO vs Streets results
- Replies: 1
- Views: 18133
Re: Avoided runoff - ECO vs Streets results
Hi picknb, Thanks for your interest in using i-Tree Tools. The key to the results you're seeing is that interception in i-Tree Streets is different, and more inclusive, than avoided runoff in i-Tree Eco and the Hydro model. The following paper details the differences in methodologies between the rai...
- Tue Sep 01, 2015 2:28 pm
- Forum: Hydro
- Topic: Streamflow data / auto-calibration inputs
- Replies: 0
- Views: 19689
Streamflow data / auto-calibration inputs
Stream flow data is necessary to auto-calibrate a project in i-Tree Hydro. This is only possible in watershed-area projects; stream gauge data used in i-Tree Hydro represents discharge from a given watershed a/k/a drainage basin. Auto-calibration is optional: i-Tree Hydro can run using Suggested Def...
- Mon Aug 31, 2015 1:43 pm
- Forum: Hydro
- Topic: Weather data inputs
- Replies: 4
- Views: 26579
Weather data inputs
Weather information is required for i-Tree Hydro simulations. Of the 3 options i-Tree Hydro provides for weather input (users can pick from a map; use raw data; or use processed data), the most common and practical route is to pick from a map. If the map doesn't have data for the area or time period...
- Thu Aug 20, 2015 12:38 pm
- Forum: Trainer's Corner
- Topic: WEFTEC Workshop with i-Tree Tools & Hydro beta updates
- Replies: 0
- Views: 48192
WEFTEC Workshop with i-Tree Tools & Hydro beta updates
A PDF version of this flyer is available for download here: Please feel free to distribute this to your network of professionals who may be interested. Thanks!
- Wed Aug 19, 2015 10:02 am
- Forum: Hydro
- Topic: What is observed & predicted flow? Can I use observed flow?
- Replies: 0
- Views: 18585
What is observed & predicted flow? Can I use observed flow?
Observed and predicted streamflow are only applicable for watershed area projects, where stream gauge data is a possible project input. Observed flow is based on the measured stream gauge data. Predicted flow is simulated by model processes. The difference between observed and predicted flows become...
- Tue Aug 11, 2015 11:44 am
- Forum: Hydro
- Topic: Sewer Systems & WWTPs
- Replies: 0
- Views: 17742
Sewer Systems & WWTPs
What outputs reflect water in sewer systems and Waste Water Treatment Plants (WWTPs)? In the outputs of i-Tree Hydro, impervious flow is a component of total flow which represents water flowing on impervious surfaces (such as roads and sidewalks) and in subsurface pipe networks (such as sewer syste...
- Thu Aug 06, 2015 1:06 pm
- Forum: Hydro
- Topic: Hydrological Parameters and Model Processes in i-Tree Hydro
- Replies: 0
- Views: 19232
Hydrological Parameters and Model Processes in i-Tree Hydro
This post will include answers to frequently asked questions about hydrological parameters in step 3 (a/k/a parametrization). Additional information about this subject can be found in: The i-Tree Hydro User Manual: http://www.itreetools.org/resources/manuals/i-Tree%20Hydro%20Users%20Manual.pdf The i...
- Tue Aug 04, 2015 12:22 pm
- Forum: Hydro
- Topic: Land Cover inputs
- Replies: 0
- Views: 19114
Land Cover inputs
What land cover information is needed in i-Tree Hydro? Tree Cover (%) Pervious Cover Beneath Tree Canopy (%; representing land cover under tree cover) Impervious Cover Beneath Tree Canopy (%; representing land cover under tree cover) Evergreen Tree (%; a percent of a percent, representing how much ...
- Tue Aug 04, 2015 9:46 am
- Forum: Hydro
- Topic: Elevation inputs
- Replies: 0
- Views: 18788
Elevation inputs
Project elevation information can be input as either: a Topographic Index (TI) file, developed for use in hydrological models; or a Digital Elevation Model (DEM) file, commonly used in GIS software for a variety of purposes. TI files have been pre-processed and loaded into i-Tree Hydro to make it ea...
- Tue Aug 04, 2015 7:59 am
- Forum: Hydro
- Topic: Calibration Overview
- Replies: 0
- Views: 18229
Calibration Overview
General questions about calibration in i-Tree Hydro are hopefully answered by the following. More specific questions about troubleshooting auto-calibration can be addressed case by case. Additional information about this subject can be found in: The i-Tree Hydro User Manual: http://www.itreetools.or...
- Fri Jul 31, 2015 12:19 pm
- Forum: Hydro
- Topic: What scale is right for my project?
- Replies: 0
- Views: 17661
What scale is right for my project?
i-Tree Hydro is flexible with regard to spatial and temporal scale of inputs. A project can be about a large or small area of land or time. In terms of project time periods: i-Tree Hydro works with hourly inputs and outputs. Thus projects are in theory limited to one hour as a minimum project time p...
- Fri Jul 31, 2015 10:13 am
- Forum: Hydro
- Topic: Project area: watershed or non-watershed?
- Replies: 0
- Views: 19958
Project area: watershed or non-watershed?
i-Tree Hydro can simulate how tree and other vegetation cover effects runoff for watershed areas, such as all land upstream from and feeding into a river mouth, and non-watershed areas, such as all land within the city boundary. Synonyms of watershed area that may be more familiar: drainage basin; c...
- Wed Jul 29, 2015 3:04 pm
- Forum: Hydro
- Topic: How can Green Infrastructure be assessed in i-Tree Hydro v5?
- Replies: 0
- Views: 17664
How can Green Infrastructure be assessed in i-Tree Hydro v5?
For now, we are limited in how we can model Low Impact Development (LID) and Green Infrastructure (GI) strategies in i-Tree Hydro v5.0. We can do so with basic land cover conversions or fairly technical changes to hydrological parameters. In addition to the challenges inherent in modeling green infr...