黑河中游山前平原区土地利用变化对土壤侵蚀的影响
Effect of Soil Erosion by LUCC in Plain Before Mountain in Middle Part of Heihe River
查看参考文献11篇
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文摘
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在GIS技术的支持下,利用137Cs含量的分异规律对土壤侵蚀的发生、分布进行了研究,并对不同土地利用背景下土壤侵蚀的空间分布规律进行了定量研究.通过137Cs强度的空间差异,分析了土壤侵蚀的强度及区域差异,及其与区域土地利用、土地覆盖变化的相互关系.结果表明:(1)黑河中游山前平原区属中度侵蚀,其土壤侵蚀强度依次为荒地＞耕地＞草地,草地开垦为耕地将加剧土壤侵蚀;(2)研究区内每年耕作土地的土壤侵蚀量达0.2亿t,草地的土壤侵蚀量达0.4亿t,荒地的土壤侵蚀量达1.2亿t,区内每年由这3类主要土地利用类型造成的土壤侵蚀量约为1.8亿t;(3)近20年来黑河中游山前平原区土壤侵蚀量总体呈现增加的趋势,其西部为强风蚀地区,荒漠化日益严重,南部沿山洪积扇区土地资源的大规模开发利用,在造成本区域土地恶化的同时,加剧了中部及中北部地区向荒地演化的趋势. |
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其他语种文摘
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Under the support of the GIS technique, the occurrence and distribution of soil erosion were studied in the plain before the mountain of the Heihe river, using the 137Cs technique. And the spatial distributing rules of soil erosion under the different land use background were investigated quantificational. By the spatial analysis of the 137Cs intensity, that the intensity and district difference of the soil erosion can be revealed. Furthermore, the correlation between the soil erosion and the LUCC of the region was to be discussed. Results show that it was be-long to secondary erosion that in the plain before the mountain in the middle part of Heihe river, and the average soil erosion rates in the past 38 years of grassland, cultivated land and waste-land were increased in turn. Moreover, grassland cultivated in large acreage will accelerate the soil erosion. Secondly, the soil erosion capacity of the grassland, cultivated land and waste-land were about 0. 4 hundred million tons,0. 2 hundred million tons, 1. 2 hundred million tons respectively. Thirdly, the soil erosion of the region was presented increased trend in recently twenty years, the west area of it was eroded more strong, that the cosmically exploitation of the soil in the south, were made the land of current region deteriorated, therefore, the evolutive trend to the waste were accelerated in the lower reaches of the river. |
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来源
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水土保持学报
,2005,19(3):88-92 【核心库】
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关键词
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GIS
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137Cs示踪
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土壤侵蚀强度
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土地利用变化
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黑河流域
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地址
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1.
中国科学院寒区旱区环境与工程研究所, 冻土工程国家重点实验室, 甘肃, 兰州, 730000
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兰州大学, 西部环境教育部重点实验室, 甘肃, 兰州, 730000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1009-2242 |
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学科
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社会科学总论;农业基础科学 |
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基金
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国家自然科学基金
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中国科学院知识创新工程重大项目
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文献收藏号
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CSCD:1988949
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参考文献 共
11
共1页
|
|
1.
朱震达. 治沙工程学[M].
治沙工程学,1998:1-17
|
被引
12
次
|
|
|
|
|
2.
董光荣. 晚更新世以来巴丹吉林沙漠南缘气候变化[J].
中国沙漠,1995,40(13):1214-1218
|
被引
1
次
|
|
|
|
|
3.
王涛. 中国沙漠化研究的进展.
中国沙漠,1999,19(4):299-311
|
被引
82
次
|
|
|
|
|
4.
高志强. 基于遥感和GIS的中国土地资源生态环境质量同人口分布的关系研究.
遥感学报,1999,3(1):66-70
|
被引
41
次
|
|
|
|
|
5.
Bai Z G. Progress in the study of the soil erosion using radionuclides [J].
Adv. Earth Sci.,1998,3:232-237
|
被引
3
次
|
|
|
|
|
6.
Ritchie C. Application of radioaction caesium-137 for measuring soil erosion and sediment accumulation rates and patterns[J].
J. Environ. Qual.,1990,19:215-233
|
被引
2
次
|
|
|
|
|
7.
Sutherland R A. Caesium-137 estimates of sediment redistribution by wind [J].
Soil Sci,1991,151(15):387-396
|
被引
14
次
|
|
|
|
|
8.
Walling D E. Calibration of caesium-137 measurements to provide quantitative erosion rate data[J].
Land Degradation and Rehabilitation,1990,2:161-175
|
被引
37
次
|
|
|
|
|
9.
Sushma. Determination of Cs-137 in environmental water by ion-exchange chromatography [J].
Journal of Chromatography,1996,733:57-71
|
被引
1
次
|
|
|
|
|
10.
张春来. 干草原地区土壤~（137）Cs沉积特征.
科学通报,2002,47(3):221-225
|
被引
27
次
|
|
|
|
|
11.
严平. ~(137)Cs法测定青藏高原土壤风蚀的初步结果.
科学通报,2000,45(2):199-204
|
被引
50
次
|
|
|
|
|
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