Sainan Wu

Sainan Wu

A senior engineer researcher from China Institute of Water Resources and Hydropower Research (IWHR) . Main research areas include watershed ecosystem services, sustainable hydropower development, ecological environmental impact of hydropower development, etc.

Research on Ecosystem Services of Chishui River Basin Based on Invest Model

In China, the Jinsha River basin is significant in future hydropower development with its rich water resources. These years, more and more scholars have increasingly focused on the research of alternative habitats protection in tributary in order to mitigate the adverse effects on ecological environment caused by hydropower development. In this study we used GIS technology and InVEST model to comprehensively evaluate the ecosystem services, such as water supply, soil conservation, carbon storage and habitat quality, and their spatial and temporal dynamics in the Chishui River Basin in the last 35 years. Thus we can quickly identify the overall health level and damage of the basin. The results show that the overall habitat quality of the basin is basically stable at 0.78, the water production is increased, the soil erosion is slightly increased, the carbon sequestration capacity is reduced, and the habitat quality is improved. In order to ensure the sustainable development of the social, economic and ecological environment in the Chishui River Basin, and optimize the ecosystem services of the river basin, our research recommend: strengthen the ecological environment protection in higher priority protection areas, improve the conservation of water resources in the central areas; increase the area of forest land and increase Watershed carbon sequestration capacity; improve the ecological environment and develop the ecological construction in the lower reaches of the Chishui River. Through the feedback information of evaluation, the key technologies of river habitat protection are further improved, and the sustainable protection of alternative habitats in tributary are well realized.

This abstract is submitted to the ARRN special session.

Research on key technologies and applications of alternative habitats protection in tributary

In China, the Jinsha River basin is significant in future hydropower development with its rich water resources. These years, more and more scholars have increasingly focused on the research of alternative habitats protection in tributary in order to mitigate the adverse effects on ecological environment caused by hydropower development. Guided by multidisciplinary theories and methods such as ecology, environmental science, hydraulics, economics, and similar systems theory, we created a set of evaluation systems and technical methods to quantitatively research the feasibility and suitability for the Chishui River as an alternative habitat in tributary of the Jinsha River, targeting on the protection of economical suitability for Chishui River. In the feasibility analysis stage, several alternative habitats protection tributaries were initially selected, based on the habitat requirements of the target fish. Then during the suitability stage, the optimum from all the schemes was selected. The results shows that the Chishui River is feasible and suitable as an alternative habitat for downstream of the Jinsha River. The ecological value of Chishui River habitat protection is 1.63 times the value of direct hydropower generation of the Jinsha River. We will learn more about the detail on the key technologies of river habitat protection and the evaluation of river habitat conservation effects in the future research. Through the feedback information of evaluation, the key technologies of river habitat protection are further improved, and the sustainable protection of alternative habitats in tributary are well realized.

View 2018 Presentation here

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