Title: | Evaluating the impact of Low Impact Development (LID) practices on water quantity and quality under different development designs using SWAT |
Authors: | Seo, M., F. Jaber, R. Srinivasan and J. Jeong |
Year: | 2017 |
Journal: | Water |
Volume (Issue): | 9(3) |
Pages: | |
Article ID: | 193 |
DOI: | 10.3390/w9030193 |
URL (non-DOI journals): | |
Model: | SWAT |
Broad Application Category: | hydrologic and pollutant |
Primary Application Category: | urban stormwater and/or BMP assessment |
Secondary Application Category: | nutrient cycling/loss and transport |
Watershed Description: | 3.5 km^2 drainage area, which is a tributary of Clear Creek that is located north of League City, Texas along the coast at southeast Texas, US. |
Calibration Summary: | |
Validation Summary: | |
General Comments: | |
Abstract: | The effects of Low Impact Development (LID) practices on urban runoff and pollutants
have proven to be positive in many studies. However, the effectiveness of LID practices can vary
depending on different urban patterns. In the present study, the performance of LID practices was
explored under three land uses with different urban forms: (1) a compact high-density urban form;
(2) a conventional medium-density urban form; and (3) a conservational medium-density urban form.
The Soil and Water Assessment Tool (SWAT) was used and model development was performed to
reflect hydrologic behavior by the application of LID practices. Rain gardens, permeable pavements,
and rainwater harvesting tanks were considered for simulations, and a modeling procedure for the
representation of LID practices in SWAT was specifically illustrated in this context. Simulations
were done for each land use, and the results were compared and evaluated. The application of LID
practices demonstrated a decrease in surface runoff and pollutant loadings for all land uses, and
different reductions were represented in response to the land uses with different urban forms on a
watershed scale. In addition, the results among post-LIDs scenarios generally showed lower values
for surface runoff and nitrate in the compact high-density urban land use and for total phosphorus
in the conventional medium-density urban land use compared to the other land uses. We suggest
effective strategies for implementing LID practices. |
Language: | English |
Keywords: | effectiveness of LID practices; different urban designs; SWAT; model development;
LID modeling |