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沿岸環境科学研究センター
化学汚染・沿岸環境研究拠点（LaMer）
拠点長 岩田 久人
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【日 時】 令和元年８月５日（月） 午後４時～
【場 所】 総合研究棟１, ６階会議室（愛媛大学理学部キャンパス内）
【演 題】 Environmental flows requirements of fishes in the lower reach of the
Yellow River
【講 師】 Xiaohui Jiang1,2 and Angela Arthington3
1 Key Laboratory of Surface System and Environmental Carrying
Capacity, Xi’an 710127, China
2 Department of Environmental Engineering, College of Urban and
Environmental Science, Northwest University, Xi’an 710127, China;
3 Australian River Institute, Faculty of Environmental Sciences,
Griffith University, Nathan, Queensland 4111, Australia
【要 約】
The Yellow River in China is severely environmentally degraded as a result
of a range of anthropogenic changes, most notably the regulation and extraction
of surface water resources for irrigated agriculture. Environmental problems
include decline of native fish, reduction of area of riverine wetlands, water
quality degradation and so on. There is a growing awareness and understanding of
the need to allocate water along a river to maintain ecological processes that
provide goods and services. The government is committed to improving the state of
the environment in the Yellow River, and ensure the river health. In recent years,
many studies have been done to recommend environmental flow for the Yellow River
in China. However, most of these studies have not considered the flow requirements
of aquatic and riparian biota in any systematic manner. In this paper, holistic
methodologies are used to recommend the environmental flow for fish in the lower
Yellow River. The basic steps are following: Firstly, get the flow-related
information on selected fish in the lower Yellow River, including fish species
composition, abundance and habitat use in relation to flow conditions. Then
develop a conceptual model linking the selected fish to key aspects of the flow
regime. This conceptual model provides a means of communicating important linkages
between the fish and specific flow related processes that must be maintained in
order to protect those fish. Thirdly, identified the environmental flow objectives.
Fourthly, use hydraulic and hydrologic models to determine the magnitude, duration,
frequency and timing of flows required to meet these objectives. Finally, describe
the ecological consequences of several scenarios of flow management and to
indicate the risk of ecological harm to fishes for each scenario.
以上