東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Impact of land-use/cover change on w...

Kisanga, Danielson Ramoz.

FindBook

Google Book

Amazon

博客來

Impact of land-use/cover change on water resources on tropical mountain ecosystems: Case study of Kilimanjaro, Tanzania.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Impact of land-use/cover change on water resources on tropical mountain ecosystems: Case study of Kilimanjaro, Tanzania./
作者:	Kisanga, Danielson Ramoz.
面頁冊數:	209 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 5871.
Contained By:	Dissertation Abstracts International66-11B.
標題:	Physical Geography. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3194219
ISBN:	9780542391668

Impact of land-use/cover change on water resources on tropical mountain ecosystems: Case study of Kilimanjaro, Tanzania.
Kisanga, Danielson Ramoz.

Impact of land-use/cover change on water resources on tropical mountain ecosystems: Case study of Kilimanjaro, Tanzania. - 209 p.

Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 5871.

Thesis (Ph.D.)--Clark University, 2005.

Many tropical mountain watersheds, especially in Africa, are experiencing river discharge decreases during dry seasons. In some cases, previous permanent streams have become intermittent in flow regime. This degradation in their flow characteristics decreased the regional reliability of water resources.

ISBN: 9780542391668Subjects--Topical Terms:

893400
Physical Geography.

Impact of land-use/cover change on water resources on tropical mountain ecosystems: Case study of Kilimanjaro, Tanzania.
LDR:03270nmm 2200313 4500 001 1822910
005 20061127103239.5
008 130610s2005 eng d
020 $a 9780542391668
035 $a (UnM)AAI3194219
035 $a AAI3194219
040 $a UnM $c UnM
100 1 $a Kisanga, Danielson Ramoz. $3 1912038
245 1 0 $a Impact of land-use/cover change on water resources on tropical mountain ecosystems: Case study of Kilimanjaro, Tanzania.
300 $a 209 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 5871.
500 $a Chief Instructor: Laurence A. Lewis.
502 $a Thesis (Ph.D.)--Clark University, 2005.
520 $a Many tropical mountain watersheds, especially in Africa, are experiencing river discharge decreases during dry seasons. In some cases, previous permanent streams have become intermittent in flow regime. This degradation in their flow characteristics decreased the regional reliability of water resources.
520 $a This study investigated the impact of land-use/cover change for 17 years, from 1984 to 2001 and hydrogeomorphic properties affecting water resources within part of Kilimanjaro watersheds. The purpose of this investigation was to provide insights into land-use/cover changes occurring in tropical mountain watersheds. Land-use/cover types were determined using the unsupervised image classification method on Landsat TM and ETM+ data. The results from this analysis were used as inputs into assessing the study area's soil erosion risk potential and land-use/cover change. Soil erosion risk potential was examined using the multi-criteria evaluation (MCE) approach, which coupled GIS and decision systems. The MCE evaluated and standardized seven factors: land-use/cover types, soil erodibility, rainfall erosivity, slope steepness, slope length, profile and plannimetric curvatures. Slope and curvature factors were derived from a DEM generated from a 1:50000 topographic map of the study area. Change detection was performed using a cross-classification method.
520 $a Deforestation with the conversion of these lands into agriculture was common in the upper parts of the mountain. Overgrazing and cultivation of marginal shrublands, stream and river banks increased in the lower parts of the Kilimanjaro watersheds over the period of investigation. Soil erosion features were evident on cleared fields, especially when slopes are moderate. The connectivity of areas with high potential for soil erosion to streams and rivers was assessed through establishing runoff routes for these areas derived from the DEM. Deforestation led to increased soil erosion risk and increased potential for the transportation of sediments from these highland eroding areas to water bodies through defined runoff routes. The observed dry season desiccation of water resources and increased wet season flooding were found to be related to land-use and land-cover changes occurring in the watersheds.
590 $a School code: 0048.
650 4 $a Physical Geography. $3 893400
650 4 $a Agriculture, Soil Science. $3 1017824
650 4 $a Hydrology. $3 545716
690 $a 0368
690 $a 0481
690 $a 0388
710 2 0 $a Clark University. $3 1017690
773 0 $t Dissertation Abstracts International $g 66-11B.
790 1 0 $a Lewis, Laurence A., $e advisor
790 $a 0048
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3194219