Sustainability assessment of water resource in Guangxi Xijiang river basin based on composite index method

摘要

Taken one of the rising national strategies of Xijiang river basin as the study area, we first established the sustainable utilization index system of water resources assessment. Then, the analytic hierarchy process was applied to calculate the index weights. And the composite index method was applied to evaluate the sustainability of water resources of the study area from 2010 to 2014. The results indicated that Nanning, Liuzhou, Guilin and Fangchenggang four cities had higher level of sustainability. Qinzhou and Chongzuo city were in the status of unsustainable. The Guangxi Xijiang river basin was in the status of sustainable level in the last five years. The degree of sustainable utilization fluctuated during the years, with the score went up to 43.26 from 2010 to 2013 and then declined to 39.75 at 2014.