IMPACTS OF URBANIZATION ON SURFACE HYDROLOGY, LITTLE EAGLE CREEK, INDIANA, AND ANALYSIS OF LTHIA MODEL SENSITIVITY TO DATA RESOLUTION
- 1 March 2001
- journal article
- research article
- Published by Informa UK Limited in Physical Geography
- Vol. 22 (2), 135-153
- https://doi.org/10.1080/02723646.2001.10642734
Abstract
Land-use change in urbanizing areas can significantly alter the hydrology of a watershed and can have serious impacts on wetland water balances, downstream flooding, and groundwater recharge. Most currently available models used in determining the hydrologic impacts of urbanization are not well suited to long-term hydrologic analysis or are too complex and data intensive for widespread practical application. The Long-Term Hydrologic Impact Assessment (LTHIA) model run on a Geographic Information System (GIS) is a relatively simple, user-friendly model that uses the Curve Number method to estimate changes in surface runoff between different stages of development. Application of the model to a large, rapidly urbanizing watershed near Indianapolis, Indiana, suggests that average annual runoff depths increased by more than 60% from 1973 to 1991, with even greater increases for some individual sub-basins. These results are consistent with runoff changes estimated from historical stream flow data in the watershed. A sensitivity analysis to determine minimum data requirements shows that a precipitation record length of 15 years or more is required to produce consistent results with LTHIA and that the highest possible resolution land-use and soils data should be used. The LTHIA model is now available on the Internet at http://www.ecn.purdue.edu/runoff. [Key words: hydrology, urbanization, modeling, GIS.]Keywords
This publication has 16 references indexed in Scilit:
- Long-Term Hydrologic Impact of Urbanization: A Tale of Two ModelsJournal of Water Resources Planning and Management, 2001
- Assessing Watershed-Scale, Long-Term Hydrologic Impacts of Land-Use Change Using a GIS-NPS ModelEnvironmental Management, 2000
- COMPOSITE VS. DISTRIBUTED CURVE NUMBERS: EFFECTS ON ESTIMATES OF STORM RUNOFF DEPTHS1Jawra Journal of the American Water Resources Association, 1998
- Assessing long‐term hydrologic effects of land use changeJournal AWWA, 1997
- Urban Watershed Modeling Using Geographic Information SystemJournal of Water Resources Planning and Management, 1995
- RASTER‐BASED HYDROLOGIC MODELING OF SPATIALLY‐VARIED SURFACE RUNOFF1Jawra Journal of the American Water Resources Association, 1995
- A Practical Method for Estimating the Impact of Land-Use Change on Surface Runoff, Groundwater Recharge and Wetland HydrologyJournal of the American Planning Association, 1994
- Review of GIS Applications in Hydrologic ModelingJournal of Water Resources Planning and Management, 1993
- Geographic Information Systems in Urban Storm‐Water ManagementJournal of Water Resources Planning and Management, 1993
- A land use and land cover classification system for use with remote sensor dataProfessional Paper, 1976