Calculation of Wetlands Ecological Water Requirement in China’s Western Jilin Province Based on Regionalization and Gradation Techniques

Abstract

Abstract. In this study a method for measuring the regional hydrological connectivity and water supply requirement of wetlands in Western Jilin Province (WJL) is defined and verified. The ecological water requirements of 216 wetlands, under various guarantee frequencies, were calculated and analyzed. In addition, twelve indicators were used to establish an evaluation index system, to characterize their ecological water requirements. The results showed that 12 hydrologically connected regions were delineated in WJL, and the 216 wetlands can be classified to six grades by AHP (Analytic Hierarchy Process) method. The annual minimum, suitable, and maximum ecological water requirements of these wetlands were found to be 7.72×10 8 m 3 , 13.76×10 8 m 3 , 26.15×10 8 m 3 respectively, with 50% guarantee frequency. The primary water supply to the lakes and marshes was found to be from regional sources that provided a scientific basis for the allocation of water resources from the interconnected river-lake system network (IRLSN) in WJL.

Study on the Flood Water Resources and its Utilization in Western Jilin

“…The terrain looks like a dustpan with high in the east, south, west and low in the north and middle. Western Jilin covers an area of 55,340 km 2 that consists of 11 counties (cities): Baicheng, Zhenlai, Taonan, Tongyu, Daan, Songyuan, Qianguo, Qian'an, Changling, Fuyu and Nong'an ( Figure 1) [8]. The climate can be characterized by a transitional zone form half-wet to drought, with an annual average temperature of 5°C.…”

Water resources sustainability model for wetland conservation based on anonymous expert elicitation

“…Martinez-Martinez et al (2015) studied the environmental benefits and economic cost of wetland restoration scenarios for sediment reduction in the Raisin River, in the southeastern of Michigan and northeastern of Ohio. Zhang (2016) performed the evaluation of water requirements based on regionalization and prioritization methods in China´s western Jilin Province. Sutadian (2017) prioritized the water quality criteria for the West Java Province.…”

An Interval Fuzzy, Double-Sided, Chance-Constrained Stochastic Programming Model for Planning the Ecological Service Value of Interconnected River Systems

“…The western Jilin Province is located in the Songnen Plain, and it is an ecologically fragile area with little rainfall, serious soil salinization, and a sensitive ecological environment [1]. The interconnected river system network project can improve the self-healing ability of the water body by enhancing fluidity and continuity, and can realize the long-term health and stability of the water body [2].…”

“…According to Zhang et al's study, the total wetland area decreased sharply and the patch density increased significantly from 1950s to 2012, indicating that it is very important to rationally use water resources to replenish wetlands [8]. Zhang et al studied the water supply requirement of wetlands in western Jilin Province, which did not comprehensively consider the water requirement of lake and ponds and the water allocation for the optimal value of ecological service [1]. Therefore, it is very important to study the rational allocation of water resources to maximize the ecological service value in the interconnected river systems in the western Jilin Province.…”