评估实现SDG6的综合用水再利用效率和影响因素
Chen Feng1, Fengping Wu1, Lina Zhang1
1Business School, Hohai University, Nanjing, 211100, China.
Journal of environmental management
|December 31, 2024
概括
中国的水利用效率从2011年到2021年略有提高,回收水利用效率最高. 极高的温度显著影响水的再利用效率,显示出空间溢出效应.
科学领域:
- 环境科学 环境科学
- 水资源管理 水资源管理
- 计量经济学 计量经济学
背景情况:
- 全球水资源短缺和污染需要提高水的再利用效率.
- 中国的水再利用系统需要详细的分析来确定改进领域.
- 可持续发展目标6 (SDG6) 为水资源管理指标提供了一个框架.
研究的目的:
- 评估中国各个阶段的水利用效率:水利用,废水处理和回收水利用.
- 为了研究极端温度对水的再利用效率的影响.
- 分析温度对再利用水的空间溢出效应.
主要方法:
- 使用一个动态的三阶段数据环境分析 (DEA) 模型来评估水的再利用效率.
- 用一个空间德宾模型来检查极端温度的影响.
- 输入-输出指标是根据SDG6标准进行选择的.
主要成果:
- 在2011年至2021年期间,中国的水再利用效率呈现出轻微的上升趋势.
- 回收水的再利用阶段与用水和废水处理相比,显示出更高的效率.
- 水资源稀缺和中等地区的省份表现出更好的用水效率.
- 废水处理和回收水的再利用效率普遍提高,两极分化减少.
- 极高和平均温度显著影响了水的再利用效率,而极低的温度没有短期影响.
- 极高的温度显示出显著的空间溢出效应.
结论:
- 在中国,水的再利用效率正在提高,特别是在再生水的再利用阶段.
- 区域水资源的可用性影响了水资源利用效率.
- 温度,特别是极高的温度,是影响水的再利用效率的关键因素,并表明空间依赖.
- 优化水资源再利用系统需要对阶段间的动态和气候影响有细微的了解.
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