干旱区生态环境知识资源中心(Arid): Impacts of vegetation dynamics on hydrological simulations under drought conditions in a humid river basin in Southern China

Arid

DOI	10.1002/eco.2630
	Impacts of vegetation dynamics on hydrological simulations under drought conditions in a humid river basin in Southern China
	Liu, Cancan; Chen, Yongqin David
通讯作者	Chen, YD
来源期刊	ECOHYDROLOGY
ISSN	1936-0584
EISSN	1936-0592
出版年	2024
卷号	17 期号:3
英文摘要	Vegetation plays an essential role in the atmospheric and hydrological processes, and vegetation responds differently to climate change in various regions, especially in extreme climates. Therefore, the use of static prescribed vegetation information from past years in numerical models can be a source of biases in hydrological simulations. However, previous studies have mainly focused on the effects of vegetation dynamics on hydrological processes in arid and semi-arid regions. It remains unclear how static or dynamic vegetation affects hydrological simulations in humid regions, especially under drought conditions. In this study, the Weather Research and Forecasting (WRF) model coupled with Noah-MP was used to assess the impact of vegetation dynamics on hydrological simulations in the East River basin (ERb) of China, which is a major water source for several major cities in the Pearl River Delta. The model was run with prescribed and dynamic vegetation conditions, respectively. Our model validation based on observed 2-m temperature (T2) and Leaf Area Index (LAI) showed that the model performance was improved when vegetation dynamics were considered. Our simulations with static or dynamic vegetation showed the impacts of vegetation dynamics on hydrological simulations under droughts. The model with vegetation dynamics simulated a wetter condition with higher soil moisture and runoff and lower T2, compared with the simulations of static vegetation. The results suggested that ignoring vegetation dynamics may overestimate the severity of drought in this humid basin, unlike arid and semi-arid regions. Therefore, consideration of vegetation dynamics in this humid basin will deepen our research on different types of zones and serve as a reference for other humid regions. Unrealistic LAI (vegetation information) likely causes significant biases in regional climate simulations. Dramatic changes in vegetation were observed in the East River basin. Our results showed that the performance of the WRF model was significantly improved with a more appropriate representation of vegetation, that is, dynamic vegetation. Furthermore, the drought severity was highly overestimated (higher temperature and lower LAI, drier soil moisture, less runoff, etc.) when the vegetation dynamics were ignored. Therefore, the vegetation dynamics should be considered in this humid region, especially during extreme drought conditions.
英文关键词	droughts East River basin Noah-MP vegetation dynamics WRF
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001174906500001
WOS关键词	PEARL RIVER ; MODEL ; PRECIPITATION ; INDEX ; TEMPERATURE ; VARIABILITY ; PERFORMANCE ; DATASETS
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403348
推荐引用方式 GB/T 7714	Liu, Cancan,Chen, Yongqin David. Impacts of vegetation dynamics on hydrological simulations under drought conditions in a humid river basin in Southern China[J],2024,17(3).
APA	Liu, Cancan,&Chen, Yongqin David.(2024).Impacts of vegetation dynamics on hydrological simulations under drought conditions in a humid river basin in Southern China.ECOHYDROLOGY,17(3).
MLA	Liu, Cancan,et al."Impacts of vegetation dynamics on hydrological simulations under drought conditions in a humid river basin in Southern China".ECOHYDROLOGY 17.3(2024).