塔里木河干流生态输水效益评估

Evaluation on ecological water delivery efficiency of Tarim River main stream

本文基于水文数据收集、实地植被调查和遥感监测等结果,从输水过程和淹灌效率、土壤水响应、植被生长与群落结构变化及生态环境质量的时空格局4个方面,全面评估并明确了2021年度塔河干流生态输水效益。结果表明:2021年生态输水量超额完成,85.9%的淹灌区域得到8天以上的有效淹灌,土壤湿润化发展,植被覆盖度增加,输水区生态环境状况整体好转;RSEI均值稳定,生态质量状况等级为差的区域,从10.68万亩减少到8.36万亩,下降21.74%;生态质量状况等级为中的区域,从45.78万亩增加至70.19万亩,提升达53.33%。

Based on the results of hydrological data collection,field vegetation survey and remote sensing monitoring,this paper comprehensively evaluates and defines the ecological water transport benefits of Tarim River main stream in 2021 from four aspects as follows:water delivery process and flooding irrigation efficiency,soil water response,vegetation growth and community structure changes,and the temporal and spatial patterns of ecological environment quality.Annual ecological water delivery benefits of the main stream of the Tarim River.The results show that in 2021,the ecological water delivery is overcompleted,and 85.9%of the flooded areas is found to be effective for more than 8 days,with developed soil moisturization,increased vegetation coverage,and improved overall ecological environment of the water delivery area.The average RSEI value is stable,and the area with poor ecological quality status has decreased from 106,800mu to 83,600mu.The decrease rate is 21.74%.The area with medium ecological quality status has increased from 457,800mu to 701,900mu.The increase rate is 53.33%.