Water Resources Planning and Management

Poster Abstract

Assessment of Water Ecological Security and the Variation Analysis of Water Ecosystem Regulation Function in the Pear River Delta

Wednesday, January 4
10:00 AM - 5:00 PM
Location: ChuLv Hall

With the rapid development of economy and population, the water resources in the Pearl River Delta are over-exploitation, and the function of the water ecosystem is decreased. Based on the analysis of water ecological security status in the Pearl River Delta, according to the pressure- state- response model and the index system of water ecological security, taking nine cities in the Pearl River Delta as a case study, the water ecological security was assessed and analyzed. The results show that more than 75% cities in the Pearl River Delta region are below grade III, and the overall level of the ecological security in the Pearl River Delta is not optimistic. The water ecosystem regulation function in the Pearl River Delta mainly includes hydrological adjustment, river sediment transport, soil conservation, water purification, water resource savings and regulation, biological habitat function. Under the condition of different inflow, the research results about the variation of the aquatic ecosystem structure and the regulatory function of the aquatic ecosystems show that, aquatic biomass in the Pearl River Delta is an overall higher in the dry season, a lower in the wet season. The regulatory function of the aquatic ecosystems is larger in the wet season, and is smaller in the dry season. The study has important significance and practical value to improve the utilization rate of water resources, control water pollution, alleviate the water ecological problems and realize the water ecological security in the Pearl River Delta region.

Li Zhang

Pearl River Water Resources Institute

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Jianyou Fan

Pearl River Water Resources Commission of the Ministry of Water Resources

Presentation(s):

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