干旱区生态环境知识资源中心(Arid): 基于RWEQ的宁夏草地防风固沙服务评估

Arid

	基于RWEQ的宁夏草地防风固沙服务评估
其他题名	Sand-fixing function of the grassland ecosystem in Ningxia based on the revised wind erosion model
	王洋洋; 肖玉; 谢高地; 徐洁
来源期刊	资源科学
ISSN	1007-7588
出版年	2019
卷号	41 期号:5 页码:980-991
中文摘要	宁夏草地在区域防风固沙中发挥了重要的作用.现有研究大多是基于微观尺度,针对区域尺度的宁夏草地防风固沙时空格局及其变化规律尚不清楚.本文基于RWEQ模型,利用ArcGIS和ENVI,对20002015年间宁夏草地防风固沙服务功能进行了定量化的估算.结果表明:①20002015年宁夏草地年潜在风蚀总量为1028.30~7540.50万t,年实际风蚀总量为269.75~3318.71万t;②20002015年宁夏草地年防风固沙物质总量为729.80~4120.04万t,16年间共增加了124.13万t,平均单位面积年防风固沙物质量在0.33~1.77 kg/m~2之间,空间分布呈现出中高南北低的特点;防风固沙保有率平均值为0.65~0.79;③草地防风固沙等级以中等和较弱为主,占总固沙量的47%~65%;中等及以上的草地面积波动增加,弱和较弱等级的草地面积减少;④中部干旱区和南部山区草地防风固沙量占总量的90%以上,北部灌区草地防风固沙量则呈现先增后减的趋势.北部灌区和中部干旱区是未来风沙治理需更加关注的区域.本文揭示了宁夏草地防风固沙的时空格局,为未来区域风沙治理提供了参考。
英文摘要	Grassland in Ningxia Hui Autonomous Region plays a crucial role in sand-fixing. But most of the existing studies are based on micro-scale research, therefore the temporal and spatial patterns of grassland wind-breaking and sand-fixing functions at the regional scale in Ningxia are still unclear. Based on the revised wind erosion equation (RWEQ) model, we quantitatively estimated the sand-fixing function of the grassland ecosystem in Ningxia from 2000 to 2015 with ArcGIS and ENVI. The results show that: (1) The amount of total potential wind erosion ranged from 1028.3010~4 t to 7540.5010~4 t while the amount of total actual wind erosion was calculated to be from 269.7510~4 t to 3318.7110~4 t. (2) The total amount of fixed material of the grassland in Ningxia ranged from 729.8010~4 t to 4120.0410~4 t, increased by 124.13*10~4 t through the study period, and the average amount of fixed material per unit area ranged between 0.33 kg/m~2 and 1.77 kg/m~2, with a spatial distribution pattern of high in the central region and low in the north and south. Retention rates increased and averaged between 0.65 and 0.79. (3) The levels of sand-fixing function of grassland in Ningxia from 2000 to 2015 were mainly moderate and weak, accounting for 47% to 65% of the total amount of sand fixation. The area of grassland with moderate and above levels of sand-fixing function increased, while the area with weak and relatively weak grades kept reducing. (4) The proportion of sand-fixing function in the grasslands of the southern mountainous areas and the central arid areas was more than 90% , while that in the northern irrigation grassland decreased first and then increased. The northern and central arid areas need more attention on the management of sandstorm in the future. This study revealed the temporal and spatial patterns of sand fixation of grassland in Ningxia, providing a reference for future wind and sand management.
中文关键词	宁夏 ; 草地 ; 防风固沙 ; 修正风蚀方程模型(RWEQ) ; 生态系统服务 ; 风蚀 ; 时空格局
英文关键词	Ningxia grassland sand-fixing function revised wind erosion equation (RWEQ) ecosystem services wind erosion spatiotemporal patterns
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6501589
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239860
作者单位	中国科学院地理科学与资源研究所;;中国科学院大学, ;;, ;;, 北京;;北京 100101;;100049, 中国
推荐引用方式 GB/T 7714	王洋洋,肖玉,谢高地,等. 基于RWEQ的宁夏草地防风固沙服务评估[J]. 中国科学院地理科学与资源研究所,2019,41(5):980-991.
APA	王洋洋,肖玉,谢高地,&徐洁.(2019).基于RWEQ的宁夏草地防风固沙服务评估.资源科学,41(5),980-991.
MLA	王洋洋,et al."基于RWEQ的宁夏草地防风固沙服务评估".资源科学 41.5(2019):980-991.