干旱区生态环境知识资源中心(Arid): ~(137)Cs示踪法研究湟水上游和布哈河下游区域土壤侵蚀强度

Arid

	~(137)Cs示踪法研究湟水上游和布哈河下游区域土壤侵蚀强度
其他题名	~(137)Cs tracing technique to study soil erosion between upper Huangshui Basin and lower Buha River Basin
	陶炳德; 沙占江; 郭丽霞; 拉本; 肖景义
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2013
卷号	36 期号:6 页码:997-1005
中文摘要	通过~(137)CS示踪技术,并采用土壤剖面核素单位面积浓度与背景值之间的理论模型,对布哈河下游和青海湖东北岸湟水上游区域的土壤侵蚀进行了研究,结果表明:~(137)Cs面积活度与植被盖度之间存在着正相关关系,两区域相关系数为0.93。湟水上游河谷土壤侵蚀模数在87.62~1 458.41 t·km~(-2)·a~(-1)之间,采样点平均土壤侵蚀模数为933.31t·km~(-2)·a~(-1)。布哈河下游区域土壤侵蚀模数在431.03~2 072.39t·km~(-2)·a~(-1)之间,采样点平均土壤侵蚀模数为1 256.97t·km~(-2)·a~(-1)。布哈河下游区域较湟水上游区域侵蚀严重,在较长的时期内两地大部分区域均处于轻度侵蚀阶段,湟水上游北部和布哈河下游西北部处于微度侵蚀阶段。
英文摘要	Being economic, efficient, and reliable, the cesium-137 tracing technique becomes an important method for soil erosion research. Huangshui Basin and Buha River Basin are two adjacent drainage basins. They are both influenced by ecological characteristics of plateau-type, desertification and unreasonable human activities, facing a gradually-worsen situation of soil loss. However, they are weak in the respect of soil erosion researches, without field measured data from run-off observation station and difficult to quantify soil erosion intensity. Therefore, cesium-137 tracing method based on soil erosion has embarked on research to look forward to a more objective access to soil erosion quantitative information of the two adjacent basins. The research shows the following results: Firstly, the two regions belong to non-farming soil type, the cesium-137 is mainly distributed in the soil of 10 cm depth and nearly none of cesium-137 is distributed in the soil deeper than 10 cm. Also, its highest concentration is on soil surface and its distribution is exponentially decreasesd from soil surface into its deeper layer. Secondly, there is a positive correlation between the cesium-137 inventory and vegetation coverage with a correlation coefficient of 0.93. It shows that the better the vegetation coverage is, the higher the cesium-137 contents are, and soil erosion phenomenon is not obvious. Thirdly, soil erosion of the two adjacent basins with drought and rare rainfall, warm steppes and high wind velocity, mainly comes from wind erosion while water erosion is weak. Fourthly, the soil erosion modulus in the upper Huangshui River Basin is between 87.62 t·km~(-2)·a~(-1) and 1 458.41 t·km~(-2)·a~(-1) and the average soil erosion modulus is 933.31 t·km~(-2)·a~(-1). The soil erosion modulus in the lower Buha River basin is between 431.03 t?km~(-2)·a~(-1) and 2 072.39 t?km~(-2)?a~(-1) and the average soil erosion modulus is 1 256.97 t?km~(-2)?a~(-1). These data show that there is a more serious erosion in the lower Buha River Basin than that in the upper Huangshui River Basin. Besides, the major areas of these basins are in a mild erosion stage while the northern part of the Huangshui River upstream and the northwest patr of the Buha River downstream are slightly eroded.
中文关键词	~(137)Cs示踪技术 ; 土壤侵蚀 ; 布哈河下游 ; 湟水上游
英文关键词	cesium-137 tracing technique soil erosion lower Buha River Basin upper Huangshui Basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5014524
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229561
作者单位	青海师范大学生命与地理科学学院, 西宁, 青海 810008, 中国
推荐引用方式 GB/T 7714	陶炳德,沙占江,郭丽霞,等. ~(137)Cs示踪法研究湟水上游和布哈河下游区域土壤侵蚀强度[J],2013,36(6):997-1005.
APA	陶炳德,沙占江,郭丽霞,拉本,&肖景义.(2013).~(137)Cs示踪法研究湟水上游和布哈河下游区域土壤侵蚀强度.干旱区地理,36(6),997-1005.
MLA	陶炳德,et al."~(137)Cs示踪法研究湟水上游和布哈河下游区域土壤侵蚀强度".干旱区地理 36.6(2013):997-1005.