干旱区生态环境知识资源中心(Arid): Watershed Drought and Ecosystem Services: Spatiotemporal Characteristics and Gray Relational Analysis

Arid

DOI	10.3390/ijgi10020043
	Watershed Drought and Ecosystem Services: Spatiotemporal Characteristics and Gray Relational Analysis
	Bai, Jizhou; Zhou, Zixiang; Zou, Yufeng; Pulatov, Bakhtiyor; Siddique, Kadambot H. M.
通讯作者	Zou, YF (corresponding author), Northwest A&F Univ, Dept Foreign Langauges, Xianyang 712100, Peoples R China. ; Zou, YF (corresponding author), Northwest A&F Univ, Inst Water Saving Agr Arid Areas China, Xianyang 712100, Peoples R China.
来源期刊	ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION
EISSN	2220-9964
出版年	2021
卷号	10 期号:2
英文摘要	This study explored the spatiotemporal characteristics of drought and ecosystem services (using soil conservation services as an example) in the YanHe Watershed, which is a typical water basin in the Loess Plateau of China, experiencing soil erosion. Herein, soil conservation was simulated using the Soil and Water Assessment Tool (SWAT), and the relationship between drought, soil conservation services, and meteorological, vegetation, and other factors since the implementation of the 'Grain for Green' Project (GFGP) in 1999, were analyzed using the gray relational analysis (GRA) method. The results showed that: (1) The vegetation cover of the Watershed has increased significantly, and evapotranspiration (ET) increased by 14.35 mm center dot a(-1), thereby increasing water consumption by 8.997 x 10(8) m(3)center dot a(-1) (compared to 2000). (2) Drought affected 63.86% of the watershed area, gradually worsening from south to north; it decreased in certain middle areas but increased in the humid areas on the southern edge. (3) The watershed soil conservation services, measured by the soil conservation modulus (SCM), increased steadily from 116.87 t center dot ha(-1)center dot a(-1) in 2000 to 412.58 t center dot ha(-1)center dot a(-1) in 2015, at a multi-year average of 235.69 t center dot ha(-1)center dot a(-1), and indicated great spatial variations, with a large variation in the downstream and small variations in the upstream and midstream areas. (4) Integrating normalized difference vegetation index (NDVI) data into SWAT model improved the model simulation accuracy; during the calibration period, the coefficient of determination (R-2) increased from 0.63 to 0.76 and Nash-Sutcliffe efficiency (NSE) from 0.46 to 0.51; and during the validation period, the R-2 increased from 0.82 to 0.93 and the NSE from 0.57 to 0.61. (5) The GRA can be applied to gray control systems, such as the ecosystem; herein, vegetation cover and drought primarily affected ET and soil conservation services. The analysis results showed that vegetation restoration enhanced the soil conservation services, but increased ET and aggravated drought to a certain extent. This study analyzed the spatiotemporal variations in vegetation coverage and the response of ET to vegetation restoration in the YanHe Watershed, to verify the significant role of vegetation restoration in restraining soil erosion and evaluate the extent of water resource consumption due to ET in the semi-arid and semi-humid Loess-area basin during the GFGP period. Thus, this approach may effectively provide a scientific basis for evaluating the ecological effects of the GFGP and formulating policies to identify the impact of human ecological restoration on ecosystem services.
英文关键词	ecosystem services drought gray relational analysis YanHe Watershed NDVI
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000622594000001
WOS类目	Computer Science, Information Systems ; Geography, Physical ; Remote Sensing
WOS研究方向	Computer Science ; Physical Geography ; Remote Sensing
来源机构	西北农林科技大学 ; University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369045
作者单位	[Bai, Jizhou; Zhou, Zixiang] Xian Univ Sci & Technol, Coll Geomat, Xian 710054, Peoples R China; [Zou, Yufeng] Northwest A&F Univ, Dept Foreign Langauges, Xianyang 712100, Peoples R China; [Zou, Yufeng] Northwest A&F Univ, Inst Water Saving Agr Arid Areas China, Xianyang 712100, Peoples R China; [Pulatov, Bakhtiyor] Tashkent Inst Irrigat & Agr Mechanizat Engineers, Qoriy Niyoziy 39, Tashkent 100000, Uzbekistan; [Siddique, Kadambot H. M.] Univ Western Australia, UWA Inst Agr, Perth, WA 6001, Australia
推荐引用方式 GB/T 7714	Bai, Jizhou,Zhou, Zixiang,Zou, Yufeng,et al. Watershed Drought and Ecosystem Services: Spatiotemporal Characteristics and Gray Relational Analysis[J]. 西北农林科技大学, University of Western Australia,2021,10(2).
APA	Bai, Jizhou,Zhou, Zixiang,Zou, Yufeng,Pulatov, Bakhtiyor,&Siddique, Kadambot H. M..(2021).Watershed Drought and Ecosystem Services: Spatiotemporal Characteristics and Gray Relational Analysis.ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION,10(2).
MLA	Bai, Jizhou,et al."Watershed Drought and Ecosystem Services: Spatiotemporal Characteristics and Gray Relational Analysis".ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION 10.2(2021).