東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

The Impacts of Land Use and Land Cov...

Shrestha, Dinesh.

Linked to FindBook

Google Book

Amazon

博客來

The Impacts of Land Use and Land Cover Change on Water Quality in the Big Sioux River: 2007-2016.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The Impacts of Land Use and Land Cover Change on Water Quality in the Big Sioux River: 2007-2016./
Author:	Shrestha, Dinesh.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	163 p.
Notes:	Source: Masters Abstracts International, Volume: 80-11.
Contained By:	Masters Abstracts International80-11.
Subject:	Geography. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13807920
ISBN:	9781392118696

The Impacts of Land Use and Land Cover Change on Water Quality in the Big Sioux River: 2007-2016.
Shrestha, Dinesh.

The Impacts of Land Use and Land Cover Change on Water Quality in the Big Sioux River: 2007-2016. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 163 p.

Source: Masters Abstracts International, Volume: 80-11.

Thesis (M.S.)--South Dakota State University, 2019.

This item must not be sold to any third party vendors.

Between 2006 and 2012, conversion of 485,000 acres of grassland to cropland in eastern South Dakota was reported. In 2012, the Big Sioux River (BSR) running through most of eastern South Dakota was listed among the dirtiest rivers in the nation. This rating convinced state authorities to study trends of land cover changes in the BSR watershed and its association with BSR water quality with respect to increases in nitrate levels. This research i) quantifies spatial and temporal changes in the land cover types within the BSR watershed, and ii) identifies any correlation between these changes and changes in BSR nitrate levels. It uses the Cropland Data Layer (CDL) to characterize and determine rates of Land Cover Changes (LCC), and the non-parametric Mann-Kendall test to identify statistically significant increasing and decreasing LCC trends within the BSR watershed. Similarly, nitrate data collected from 11 gauging stations operating in the BSR watershed were analyzed using the Mann-Kendall test to identify any trends. For all the land cover classes and gauging stations that were identified as statistically significant, a Sen's Slope estimate was used to estimate their magnitudes. Only Corn/Soybean and Grassland acreage displayed a significant increasing and decreasing trends, respectively whereas remaining classes including Other Crops, Water, and Developed didn't show any trends and were considered as classes having "No Trend". Similarly, out of 11 gauging stations, one station (SD Codington K06) showed a significant increasing trend, one station (MN Pipestone 099) showed a decreasing trend and remaining other stations didn't show any trends and were considered as gauging stations having "No Trend". In general, there was insufficient evidence to conclusively link changes in Corn/Soybean LCC to changes in nitrate levels. The results of this research suggest that changes should be made to gauging station locations and sampling frequency, particularly on smaller tributary rivers and streams within the watershed.

ISBN: 9781392118696Subjects--Topical Terms:

524010
Geography.

The Impacts of Land Use and Land Cover Change on Water Quality in the Big Sioux River: 2007-2016.
LDR:03115nmm a2200325 4500 001 2208808
005 20191025102420.5
008 201008s2019 ||||||||||||||||| ||eng d
020 $a 9781392118696
035 $a (MiAaPQ)AAI13807920
035 $a (MiAaPQ)sdstate:10642
035 $a AAI13807920
040 $a MiAaPQ $c MiAaPQ
100 1 $a Shrestha, Dinesh. $3 3435863
245 1 4 $a The Impacts of Land Use and Land Cover Change on Water Quality in the Big Sioux River: 2007-2016.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2019
300 $a 163 p.
500 $a Source: Masters Abstracts International, Volume: 80-11.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Napton, Darrell.
502 $a Thesis (M.S.)--South Dakota State University, 2019.
506 $a This item must not be sold to any third party vendors.
520 $a Between 2006 and 2012, conversion of 485,000 acres of grassland to cropland in eastern South Dakota was reported. In 2012, the Big Sioux River (BSR) running through most of eastern South Dakota was listed among the dirtiest rivers in the nation. This rating convinced state authorities to study trends of land cover changes in the BSR watershed and its association with BSR water quality with respect to increases in nitrate levels. This research i) quantifies spatial and temporal changes in the land cover types within the BSR watershed, and ii) identifies any correlation between these changes and changes in BSR nitrate levels. It uses the Cropland Data Layer (CDL) to characterize and determine rates of Land Cover Changes (LCC), and the non-parametric Mann-Kendall test to identify statistically significant increasing and decreasing LCC trends within the BSR watershed. Similarly, nitrate data collected from 11 gauging stations operating in the BSR watershed were analyzed using the Mann-Kendall test to identify any trends. For all the land cover classes and gauging stations that were identified as statistically significant, a Sen's Slope estimate was used to estimate their magnitudes. Only Corn/Soybean and Grassland acreage displayed a significant increasing and decreasing trends, respectively whereas remaining classes including Other Crops, Water, and Developed didn't show any trends and were considered as classes having "No Trend". Similarly, out of 11 gauging stations, one station (SD Codington K06) showed a significant increasing trend, one station (MN Pipestone 099) showed a decreasing trend and remaining other stations didn't show any trends and were considered as gauging stations having "No Trend". In general, there was insufficient evidence to conclusively link changes in Corn/Soybean LCC to changes in nitrate levels. The results of this research suggest that changes should be made to gauging station locations and sampling frequency, particularly on smaller tributary rivers and streams within the watershed.
590 $a School code: 0205.
650 4 $a Geography. $3 524010
650 4 $a Geographic information science. $3 3432445
690 $a 0366
690 $a 0370
710 2 $a South Dakota State University. $b Geography. $3 3431141
773 0 $t Masters Abstracts International $g 80-11.
790 $a 0205
791 $a M.S.
792 $a 2019
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13807920