Dissertation/Thesis Abstract

Impacts of Land Use and Land Cover Changes on Hydrological Regimes of the Richland Creek Watershed in Southern Illinois Using a GIS-based Hydrologic Model
by Shrestha, Prasanna, M.S., Southern Illinois University at Edwardsville, 2019, 85; 22592435
Abstract (Summary)

Rapid economic growth and urbanization can cause land use changes which has replaced forest and agricultural lands in different parts of the United States. An intensive land use change can occur due to urbanization, increasing impervious surfaces thus altering the hydrological regimes in watersheds. The objective of this project is to study how changes in land use and land cover (LULC) can impact the hydrological processes in the Richland Creek Watershed (RCW) located in Metro St. Louis area.

A rainfall-runoff simulation was done using Hydrologic Engineering Center- Hydrologic Modelling System (HEC-HMS) and GIS extension Geospatial Hydrologic modeling Extension (HEC-GeoHMS). The simulated hydrographs obtained from HEC-HMS was calibrated and validated by adjustment of parameters for four processes. There has been 2.86% increase in impervious surface and peak flow for calibrated month was plunged for 2011 compared to 2001.

Pearson’s coefficient, correlation coefficient and Nash- Sutcliffe Efficiency were greater than 0.5 for all calibration and validation which shows satisfactory performance of the model. Percent error in peak flow was little over 10% error due to flash rain pattern for July. These evaluation criteria show good performance of the hydrological model. So, the developed model for 2001 and 2011 can be applied for Richland Creek Watershed to assess impacts of land use and land cover changes. This research enhanced the understanding of the interactions between land use and land cover changes and hydrological regimes in RCW. This can be further used by policy makers for predicting flood events and plan for preparedness.

Indexing (document details)
Advisor: Hu, Shunfu
Commitee: Martinez, Adriana E., Greenfield, Ben
School: Southern Illinois University at Edwardsville
Department: Environmental Sciences
School Location: United States -- Illinois
Source: MAI 81/3(E), Masters Abstracts International
Subjects: Environmental science, Land Use Planning, Limnology
Publication Number: 22592435
ISBN: 9781088376836
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