Assessing Hydrological Connectivity Mitigated by Reservoirs, Vegetation Cover, and Climate in Yan River Watershed on the Loess Plateau, China: The Network Approach

doi:10.3390/w12061742

	Assessing Hydrological Connectivity Mitigated by Reservoirs, Vegetation Cover, and Climate in Yan River Watershed on the Loess Plateau, China: The Network Approach
	Zhao, Liang 2; Liu, Yu 1,2,3; Luo, Yong 4
刊名	WATER
	2020-06-01
卷号	12 期号:6 页码:15
关键词	hydrological connectivity wetness index network index dry
DOI	10.3390/w12061742
通讯作者	Liu, Yu(liuyu@igsnrr.ac.cn)
英文摘要	Hydrologic connectivity is related to the water-mediated transport of matter, energy, and organisms within or between elements of the hydrologic cycle. It reflects the hydrological consequences caused by topographic, land cover, and climatic factors, and is an important tool to characterize and predict the hydrological responses to climate and landscape change. In the Loess Plateau region, a large number of reservoirs have been constructed to trap sediment and storage water for drinking, irrigation, and industries. The land cover has been significantly reshaped in the past decades. These changes may alter the watershed hydrological connectivity. In this study, we mapped the spatial pattern of hydrological connectivity with consideration of reservoir impedances, mitigation of climate, and land cover in the Yan River watershed on the Loess Plateau by using the network index (NI) approach that is based on topographical wetness index. Three wetness indices were used, i.e., topographical wetness index (TWI), SAGA (System for Automated Geoscientific Analyses) wetness index (WIS), and wetness index adopted aridity index (AI) determined by precipitation and evapotranspiration (WIPE). In addition, the effective catchment area (ECA) was also employed to reveal the connectivity of reservoirs and river networks to water source areas. Results show thatECAof reservoirs and rivers account for 35% and 65%, respectively; the hydrological connectivity to the reservoir was lower than that to the river networks. The normalized hydrological connectivity revealed that the connectivity to river channels maintained the same distribution pattern but with a decreased range after construction of reservoirs. As revealed by comparing the spatial patterns of hydrological connectivity quantified byNIbased onWI(S)andWI(PE)respectively, vegetation cover patterns had significantly alternated watershed hydrological connectivity. These results imply a decreased volume of flow in river channels after reservoir construction, but with same temporal period of flow dynamic. It is illustrated that the network index (NI) is suitable to quantify the hydrological connectivity and it is dynamic in the context of human intervention and climate change.
资助项目	National Science Foundation of China[4167011589] ; International Partnership Program of the Chinese Academy of Sciences[121311KYSB20170004]
WOS关键词	TOPOGRAPHIC WETNESS INDEX ; SOIL-MOISTURE ; SPATIAL-DISTRIBUTION ; CHECK DAMS ; YELLOW-RIVER ; PATTERNS ; EVAPOTRANSPIRATION ; (DIS)CONNECTIVITY ; CATCHMENT ; RUNOFF
WOS研究方向	Water Resources
语种	英语
出版者	MDPI
WOS记录号	WOS:000554753400001
资助机构	National Science Foundation of China ; International Partnership Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/158274]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Yu
作者单位	1.Hunan Univ Art & Sci, Hunan Prov Cooperat Innovat Ctr Construct & Dev D, Changde 415000, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 4.Chengdu Univ Technol, Coll Earth Sci, Chengdu 610059, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Liang,Liu, Yu,Luo, Yong. Assessing Hydrological Connectivity Mitigated by Reservoirs, Vegetation Cover, and Climate in Yan River Watershed on the Loess Plateau, China: The Network Approach[J]. WATER,2020,12(6):15.
APA	Zhao, Liang,Liu, Yu,&Luo, Yong.(2020).Assessing Hydrological Connectivity Mitigated by Reservoirs, Vegetation Cover, and Climate in Yan River Watershed on the Loess Plateau, China: The Network Approach.WATER,12(6),15.
MLA	Zhao, Liang,et al."Assessing Hydrological Connectivity Mitigated by Reservoirs, Vegetation Cover, and Climate in Yan River Watershed on the Loess Plateau, China: The Network Approach".WATER 12.6(2020):15.