An integrated ecohydrological modeling approach to exploring the dynamic interaction between groundwater and phreatophytes

Li, Xi1; Zheng, Yi2; Sun, Zan1; Tian, Yong2; Zheng, Chunmiao1,2; Liu, Jie1; Liu, Shaomin3; Xu, Ziwei3

2017-07-24

10.1016/j.ecolmodel.2017.04.017

ECOLOGICAL MODELLING   影响因子和分区

0304-3800

1872-7026

Phreatophytes play an important role in maintaining the ecological services in arid and semi-arid areas. Characterizing the interaction between groundwater and phreatophytes is critical for the land and water management in such areas but has rarely been attempted via integrated ecohydrological modeling. In this study, a plant growth model was developed and coupled with a soil water dynamics model (Hydrus-1D) to explore the groundwater dependence of Populus euphratica, a rare, ancient and endangered phreatophytic species. The integrated ecohydroloigcal model was validated with observational data collected from the Heihe River Basin (northwest China). The groundwater dependence was also investigated at larger scales using remote sensing data and regional hydrological modeling. The major study findings include the following: (1) the ecohydrological behaviors and groundwater dependence of P. euphratica can be well explained by the existing theories; (2) groundwater is the dominant water source for P. euphratica during its growing season, and groundwater subsidy can be an intuitive measure of the water-shortage risk for P. euphratica, which is conditioned on root depth, the water-holding capacity of the soil, and groundwater depth; and (3) at large spatial and temporal scales, the impact of groundwater depth on P. euphratica growth is also discernable. A groundwater depth of 1-3.5 m appears to be the optimal depth range for P. euphratica growth in the study area. Overall, this study demonstrates how multi-source and multi-scale data can be effectively fused through an integrated modeling approach to generate a coherent understanding of the ecohydrological processes of phreatophytes. (C) 2017 Elsevier B.V. All rights reserved.

Ecohydrological modeling Groundwater Phreatophytes Populus euphratica Heihe river basin Integrated modeling

SCI ; EI

英语

通讯

National Natural Science Foundation of China[91425303] ; National Natural Science Foundation of China[91225301] ; National Natural Science Foundation of China[41622111]

Environmental Sciences & Ecology

Ecology

WOS:000404320200011

ELSEVIER SCIENCE BV

20171903650703

Groundwater ; Remote sensing ; Risk assessment ; Soil moisture ; Water management ; Watersheds

Surface Water:444.1 ; Groundwater:444.2 ; Soils and Soil Mechanics:483.1 ; Accidents and Accident Prevention:914.1

ENVIRONMENT/ECOLOGY

Web of Science

1.Peking Univ, Inst Water Sci, Beijing 100871, Peoples R China
2.South Univ Sci & Technol China, Sch Environm Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China

Li, Xi,Zheng, Yi,Sun, Zan,et al. An integrated ecohydrological modeling approach to exploring the dynamic interaction between groundwater and phreatophytes[J]. ECOLOGICAL MODELLING,2017,356:127-140.

Li, Xi.,Zheng, Yi.,Sun, Zan.,Tian, Yong.,Zheng, Chunmiao.,...&Xu, Ziwei.(2017).An integrated ecohydrological modeling approach to exploring the dynamic interaction between groundwater and phreatophytes.ECOLOGICAL MODELLING,356,127-140.

Li, Xi,et al."An integrated ecohydrological modeling approach to exploring the dynamic interaction between groundwater and phreatophytes".ECOLOGICAL MODELLING 356(2017):127-140.