Abstract
Hydrology is the most important factor that determines the formation and maintenance of wetland ecosystem. Sufficient water quantity is necessary for the restoration of degraded wetlands. This study, based on the discussion about the type, functions and services of wetlands in Honghe National Nature Reserve, defines the components for eco-environmental water requirement and calculates the total eco-environmental water requirement for wetland ecosystem. The component for water requirement includes static water requirement and dynamic water requirement. The former refers to the water quantity required from the current surface level to the ideal surface water level, while the later includes water requirements for the plants, wildlife, recharge for groundwater and soil, respectively. The results indicate that the minimum water requirement is 16362.36×104m3 and the optimal water requirement is 25329.14×104m3, while the maximum requirement is 32115.70×104m3. Water requirement for wetland plants is the main component for the eco-environmental water requirement of wetland ecosystem.
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