Document Type

Thesis - Open Access

Award Date

2017

Degree Name

Master of Science (MS)

Department

Natural Resource Management

First Advisor

Nels H. Troelstrup

Abstract

A projected increase in global population by mid-century will likely further intensify agricultural practices given future demand for food, increasing the strain on the nation’s aquatic resources. Extensive water quality monitoring will be important in agriculturally dominated regions. The main objectives of this effort were to develop an approach to assess watershed condition and watershed vulnerability to land-use/landcover (LULC) change under multiple scenarios of future development. We used U.S. EPA’s Analytical Tools Interface for Landscape Assessment (ATtILA) to analyze landscape spatial data to determine the condition of wadeable, perennial stream watersheds in the Northwestern Great Plains level III ecoregion of western South Dakota (n=1,025). We incorporated forecasted LULC data from the FOREcasting SCEnarios of Land-Use Change (FORE-SCE) model following four scenarios of future development to assess watershed vulnerability to LULC change. Watershed condition scores ranged from 0-100 (high value = good condition; median = 78). Watersheds in the Dense Clay Prairie had relatively little human influence and subsequently scored the highest (median = 88). Watersheds in the agriculturally dominated Missouri Plateau scored the lowest (median = 65). This area was classified as a restoration priority because there was limited potential for further agricultural expansion. Watersheds in the Moreau Prairie were especially vulnerable to LULC change, expected to undergo extensive land conversion in all four scenarios of future land-cover change. Because many watersheds in this area are presently in good condition but are particularly at risk of future land conversion, they were classified as protection priorities. These analyses contributed a toolset of available landscape assessment and modeled measures available to decision makers to target management efforts and prevent potentially harmful future impacts to aquatic resources.

Library of Congress Subject Headings

Watershed ecology -- South Dakota.
Landscape changes -- South Dakota.
Land use, Rural -- South Dakota.

Description

Includes bibliographical references (pages 80-96)

Format

application/pdf

Number of Pages

122

Publisher

South Dakota State University

Rights

Copyright © 2017 Aaron Suehring

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