干旱区生态环境知识资源中心(Arid): 黑河中下游防风固沙功能时空变化及影响因子分析

Arid

	黑河中下游防风固沙功能时空变化及影响因子分析
其他题名	Spatio-Temporal Changes of Sand-Fixing Function and Its Driving Forces in the Middle and Lower Reaches of Heihe River Basin
	彭婉月; 王兆云; 李海东; 柳本立
来源期刊	环境科学研究
ISSN	1001-6929
出版年	2020
卷号	33 期号:12 页码:2734-2744
中文摘要	黑河中下游是我国重要的防风固沙生态功能区,分析该区域的防风固沙功能时空变化,明确其主要的影响因子贡献,对于指导荒漠化防治、维护流域生态安全十分重要.该研究基于修正风蚀方程(revised wind erosion equation,RWEQ) 、一元线性回归斜率分析、灰色关联分析和GIS技术,分析了20002017年黑河中下游防风固沙功能动态变化及其影响因子.结果表明: ①20002017年,黑河中下游年均防风固沙量为3.210~9 t,年均防风固沙功能约为2.4410~4 t/km~2;防风固沙量总体呈增强趋势,年均增加6.67*10~7 t,年均变化率为1.85%. ②区域防风固沙功能呈现中游较强,向下游递减的空间分布特征,防风固沙功能较高区约占研究区面积的31.54%,一般区占20.77%,较低区(北部荒漠区)占47.69%;甘肃省张掖市和嘉峪关市防风固沙功能呈增加趋势,回归方程系数(slope)为0~ 26.29%,占总面积的12.51%;额济纳旗东北部和甘肃省高台县中部防风固沙功能呈下降趋势,回归方程系数为- 17.17% ~ 0,占总面积的23.30%. ③防风固沙功能主要影响因子中,风力因子最主要,贡献率为30.04%,其次为积雪覆盖、土壤湿度、植被覆盖,贡献率分别为24.57%、24.26%和 21.13%.研究显示,防风固沙工程应综合考虑气候变化、植被覆盖、土壤特性及人类活动的复合影响,实行具有空间差异化的方案.
英文摘要	The Heihe Basin is located in the middle of the Hexi Corridor is the second largest inland basin in northwest China. The middle and lower reaches of the Heihe Basin are important ecological function areas in terms of wind prevention and sand fixation. To control the desertification and maintain the ecological security of this region,it is necessary to analyze the temporal and spatial patterns of windbreak and sand-fixing ability,and to quantify the contributions of different driving forces. In the current study,we integrated the revised wind erosion equation (RWEQ),and carried out slope analysis of unary linear regression and grey relational analysis,and used GIS technology. Multi-years of wind,soil moisture,snow cover,vegetation cover,and soil surface characteristics were collected as input parameters. The results are as follows. (1) From 2000 to 2017,the average annual sand-fixing capacity of this region reached 3.2 billion tons in total,or 2.4410~4 t/km~2. The average annual sand-fixing capacity increased 6.6710~7 t per year with an average change rate of 1.85%. (2) The sand-fixing function showed a decreasing trend from the middle reach in the south to the lower reach in the north. Areas with high,medium and low sand-fixing functions accounted for 31.54%,20.77% and 47.69% of the study area,respectively. It was found that the function increased mainly in Zhangye City and Jiayuguan City,with unary linear regression coefficient (slope) ranging from 0 to 26.29%,accounting for 12.51% of the total area,while decreasing trend areas mainly distributed in the northeast Ejin Banner and in the central Gaotai County,with slope between -17.17% and 0 and accounting for 23.30% of the total area. (3) Wind was the most important factor causing 30.04% of sand-fixing function variation,followed by snow cover,soil moisture and vegetation coverage with 24.57%,24.26% and 21.13% contributions,respectively. It is suggested that the projects to prevent soil wind erosion and control desertification should consider the combined effects of climate change,vegetation coverage,soil characteristics,and human activities,and that differentiated approaches should be considered for areas with different conditions. Future changes of sand-fixing function in the study area will be estimated using the IPCC-projected climate data.
中文关键词	黑河 ; 土壤风蚀 ; 时空变化 ; 防风固沙功能 ; 修正风蚀方程
英文关键词	Heihe Basin wind erosion temporal and spatial variation sand-fixing function revised wind erosion equation
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Public, Environmental & Occupational Health
CSCD记录号	CSCD:6868940
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353625
作者单位	彭婉月, 中国科学院西北生态环境资源研究院;;甘肃省戈壁荒漠生态与环境野外科学观测研究站(敦煌);;中国科学院大学, 中国科学院沙漠与沙漠化重点实验室;;甘肃省戈壁荒漠生态与环境野外科学观测研究站(敦煌);;, 兰州;;兰州;;, 甘肃;;甘肃;;北京 730000;;730000;;100049, 中国. 王兆云, 中国科学院西北生态环境资源研究院;;甘肃省戈壁荒漠生态与环境野外科学观测研究站(敦煌);;中国科学院大学, 中国科学院沙漠与沙漠化重点实验室;;甘肃省戈壁荒漠生态与环境野外科学观测研究站(敦煌);;, 兰州;;兰州;;, 甘肃;;甘肃;;北京 730000;;730000;;100049, 中国. 李海东, 生态环境部南京环境科学研究所, 南京, 江苏 210042, 中国. 柳本立, 中国科学院西北生态环境资源研究院;;甘肃省戈壁荒漠生态与环境野外科学观测研究站(敦煌), 中国科学院沙漠与沙漠化重点实验室;;甘肃省戈壁荒漠生态与环境野外科学观测研究站(敦煌), 兰州;;兰州, 甘肃;;甘肃 730000;;730000, 中国.
推荐引用方式 GB/T 7714	彭婉月,王兆云,李海东,等. 黑河中下游防风固沙功能时空变化及影响因子分析[J],2020,33(12):2734-2744.
APA	彭婉月,王兆云,李海东,&柳本立.(2020).黑河中下游防风固沙功能时空变化及影响因子分析.环境科学研究,33(12),2734-2744.
MLA	彭婉月,et al."黑河中下游防风固沙功能时空变化及影响因子分析".环境科学研究 33.12(2020):2734-2744.