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评估城市化流域地下水质量与土地利用之间的关系
Umair Rasool1,2, Xinan Yin3, Zongxue Xu4
1State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, No. 19 Xinjiekouwai Street, Beijing, 100875, China. umairrasool31@hotmail.com.
概括
城市化显著影响地下水质量,土地利用模式直接影响水化学. 这项研究揭示了不同土地用途如何影响水质指数,突出了需要改进水资源管理策略的地区.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 城市规划 城市规划
背景情况:
- 城市化对地下水质量构成重大威胁,需要全面了解土地利用对水资源的影响.
- 有效的水资源管理策略取决于阐明土地利用模式和地下水水化之间的复杂关系.
研究的目的:
- 为了比较各种土地利用对地下水质量的影响.
- 确定影响水化学的特定土地使用类型.
- 定义不同土地利用实践与由此产生的水质之间的关系.
主要方法:
- 2016年和2021年地下水质量,土地使用类别和景观指标的比较分析.
- 从42个井取水样,以评估水化学变量并计算水质指数 (WQI).
- 使用通过谷歌地球引擎处理的Sentinel-2卫星图像进行土地使用分类;对井位周围的五个缓冲区进行分析.
主要成果:
- 在两年中,地下水质量指数 (WQI) 值表明,在研究区域的大多数地区,地下水适合饮用和家庭使用.
- 土地利用对水质的影响在特定的缓冲区中最为明显 (例如,2016年B1,B4,B5;2021年B1,B3,B5).
- 景观指标和土地使用类别显示,不同缓冲区内的水质受到不同的影响,根据年份和缓冲区名称而异.
结论:
- 土地利用显著改变了地下水的水化学成分,其影响在不同缓冲区和随着时间的推移而有所不同.
- 该研究强调了在水资源管理中考虑空间和时间的土地使用动态的重要性.
- 调查结果为制定有针对性的干预措施提供了关键数据,以减轻城市化对地下水质量的影响.
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