- Water environment carrying capacity in Dianchi Lake basin and its dynamic variation characteristics
- 基金项目：四川省教育厅资助科研项目(No.10ZC117);四川循环经济研究中心资助项目(No. XHJJ-1016)
- 绵阳职业技术学院材料工程系,绵阳 621000
- 绵阳师范学院资源环境工程学院,绵阳 621000
- Abstract：In this work, we quantitatively assessed the comprehensive effect of population increase, economic development, resource shortage and environment pollution on the water environment of Dianchi Lake in Yunnan. According to the basic concept of water environment carrying capacity (WECC) and the specific conditions of Dianchi Lake, a model was established to optimize the WECC. Population, irrigation area, gross domestic product (GDP), chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) were selected as an index system (IS) of water resource carrying capacity (WRCC) and water quality carrying capacity (WQCC). Analytic hierarchy process (AHP) was used to determine the weight of the indexes on the water environment carrying capacity. The WECC in 2003—2010 was calculated by IS-AHP. The results indicated that population has exceeded the carrying standard, economic pressure has increased rapidly and the eutrophication index (TP and TN) has exceeded the carrying standard, with significant fluctuation in most years. The overloaded WECC is in accordance with the real conditions of Dianchi Lake and the WQCC has greater influence than the WRCC. The research may provide scientific suggestions for formulation of an economic development plan for ecological environment protection and sustainable development of the water resource in the Dianchi Lake.
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