基于影响因素分析的洪河湿地及周边农场退化评价

Evaluation of Honghe River Wetland and Its Peripheral Farm Degradation Based on Influencing Factors

基于对洪河湿地退化的影响因素分析,采用层次分析法确定评价指标及各指标权重,进而用综合指标法对洪河湿地退化进行评价和退化分级。结果表明:洪河湿地退化的影响因素包括气温、大气降水量、湿地水质、湿地水量、水利工程建设和农场建造,其中水利工程建设与农场建造所占权重最大,分别为0.239与0.339;2014年洪河湿地周边各农场退化等级均为Ⅳ级,退化程度高,处于重度退化且有向极度退化发展的趋势;同年,洪河湿地保护区内综合评价指数降至0.811退化等级降为Ⅱ级,为轻度退化。为减缓湿地退化速率,应杜绝洪河湿地内耕地及排干渠扩建。

Based on the analysis of tlie influencing factors of wetland degradation in H o nghe River,the evalua-tion index and the weights of each index were determined by analytic hierarchy dex metliod was used to evaluate the degradation of Hong h e wetland. T he results showed that tlie influencing factors of the degradation of Honghe wetland included air temperature,precipitation,wetland water qualitquantity,water conservancy construction and farm construction. T he weights of construction of water conservancyand farm construction were relatively larger than ot!ier factors effecting the wetland degra0. 339 respectively. In 2014 ,the degradation grades of the farmlands near the H o nghe wetland protection area wereGrade 5 ,with a high degree of degradation,which was in a severe degeneration and an extremely degenerative trend. In the same year, due to the increase of the cultivated land area, the comprehensive evaluation index of Honghe wetland protection area has been d o w n to 0 . 811 witii the degradation grade of degradation. According to the analysis of influencing factors,the expansion rates of the cultivcanals should be prevented to mitigate the wetland degradation.