干旱区生态环境知识资源中心(Arid): 沙坡头自然保护区土壤水力蚀时空变化研究

Arid

	沙坡头自然保护区土壤水力蚀时空变化研究
其他题名	Spatiotemporal Analysis of Soil Erosion in Shapotou Reserve in China
	王亚慧; 王文瑞; 王伟伟
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2015
卷号	22 期号:1 页码:11-16
中文摘要	我国干旱荒漠区由于降雨强度大、周期短,存在着一定程度的水土流失风险.以腾格里沙漠东南缘的宁夏沙坡头国家级自然保护区1990-2011年的土壤水力侵蚀为研究对象,试图理解干旱荒漠区土壤水力侵蚀状况及动态变化规律.基于中国水土流失预报模型,在当地现有土壤类型数据、GDEM 数据和 TM 影像等基础上对该区1990年、2002年、2011年三年的土壤水力侵蚀计算并进行了分析.结果表明:沙坡头保护区土壤水力侵蚀模数最高可达39 066.02t/(km~2 ·a);在时间尺度上,1990-2002年该区土壤水力侵蚀强度基本不变,而2002-2011年明显降低,表明该区域的人为活动导致水域、用材林和栽培作物面积的增加可促使水土流失减弱;在空间上,裸地、低植被覆盖度地区以及坡度为8°~25°地区水力侵蚀相对更明显.
英文摘要	The high intensity and short duration of the rainfall events in arid desert region would lead to acute erosion risk.This paper demonstrated the evolution of soil erosion by rainfall from 1990 to 2011 as a case of Shapo tou National Nature Reserve of Ningxia that is located in edge of southeast of Tengger Desert.Based on the agrotype mapping,GDEM and L andsat TM data,the water erosion in the 1990,2002 and 2011 years was evaluated by using Chinese soil loss equation model.Results showed that the water erosion module in Shapo tou Reserve reached up to 39 066.02 t/ (km~2 ·a),which is considerable volume even though less than the wind erosion.From 1990 to 2002,the water erosion intensity remained almost stable,but from 2002 to 2011,the value dropped sharply,this evolution change indicated that the increased water,timber reforestation and farml and which were associated with human activities resulted in a lower density of water erosion. There were also significant spatial differences of water erosion in Shapo tou Reserve,the value in the bare area,lower vegetation coverage area and the slope of 8°~25°was significantly higher than that in other areas.
中文关键词	水土保持 ; 水力侵蚀 ; 中国水土流失预报模型 ; 土地覆被 ; 沙坡头
英文关键词	soil and water conservation water erosion Chinese soil loss equation model land cover Shapotou
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:5357385
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233362
作者单位	兰州大学资源环境学院/干旱区气候变化与水循环研究中心, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	王亚慧,王文瑞,王伟伟. 沙坡头自然保护区土壤水力蚀时空变化研究[J]. 兰州大学,2015,22(1):11-16.
APA	王亚慧,王文瑞,&王伟伟.(2015).沙坡头自然保护区土壤水力蚀时空变化研究.水土保持研究,22(1),11-16.
MLA	王亚慧,et al."沙坡头自然保护区土壤水力蚀时空变化研究".水土保持研究 22.1(2015):11-16.