Assessing the effects of increased impervious surface on the aquifer recharge through river flow network, case study of Jackson, Tennessee, USA
Assessing the effects of increased impervious surface on the aquifer recharge through river flow network, case study of Jackson, Tennessee, USA
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评估不透水表面增加对通过河流网络补给含水层的影响，美国田纳西州杰克逊的案例研究
DOI：
10.1016/j.scitotenv.2023.162203
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发表时间：
2023
影响因子：
9.8
通讯作者：
Karimi, Maryam
中科院分区：
文献类型：
--
作者：
Giglou, Abolfazl Nazari;Nazari, Rouzbeh;Jazaei, Farhad;Karimi, Maryam
了解将城市化与陆地表面和河流环境的补给过程联系起来的途径，对于实现低影响发展具有重要意义。因此，在田纳西州杰克逊的补给率中，评估了具有低和高开发率的城市化地区的贡献，沿着由于不透水面增加而导致的预期溢流进入河流网络。为此，首先，使用标准和修改后的SCS-CN方法计算最大可能洪水条件下的损失。然后，TUFLOW应用于模拟二维洪水的历史24小时可能最大降水事件与100年一遇。TUFLOW的结果随后使用标准和修改的SCS-CN方法的结果进行校准。一个校准MODFLOW评估城市化的影响，因此，合理的延长河流网络的补给率。结果显示，西木在地下水补给中的贡献比穆萨街少19%，而它提供的流量比穆萨街多约2.7%。TUFLOW的性能评价结果显示，0.4916和0.689作为Nash-Sutcliffe，分别为标准和修改的SCS-CN方法。改良SCS-CN处理的土壤水流量和深度分别比对照增加了3.3%和8.3%，但土壤贮水量保持在0.16mm左右。结果表明，与标准方法相比，改进的SCS-CN方法能更快地达到土壤最大蓄水量，从而提高了洪量和流量。为此，在相同的沉淀条件下，由改性的SCS-CN产生的排放量比标准方法高约1.5倍。我们的研究结果表明，根据修改后的SCS-CN估计设计任何建筑，主要是下游大坝，将提供更多的安全性，特别是在拥挤的地区。此外，溢出多余的地表径流进入河流网络的增加不透水表面放大流量，深度和速度通过河流网络，最终离开该地区，而不增加含水层的补给率。研究结果为建成区可能的可持续发展方案和洪水管理提供了见解。
Understanding pathways connecting urbanization to the recharge process across the land surface and river environment is of great significance in achieving low-impact development. Accordingly, the contribution of an urbanized region with a low and high development rate, along with the expected overflow into the river network resulting from increased impervious surfaces, was assessed in the recharge rate at Jackson, Tennessee. To this end, first, the losses were calculated using the standard and modified SCS-CN methods for the maximum probable flood condition. Then, TUFLOW was applied to simulate the two-dimensional flood for a historic 24-h probable maximum precipitation event with a 100-year return period. The results of TUFLOW were later calibrated using the results of standard and modified SCS-CN methods. A calibrated MODFLOW was employed to assess the effects of urbanization and, consequently, the plausible extended river network on the recharge rate. Results revealed that the West Wood contribution in groundwater recharge was 19 % less than the Musa Street, while it supplies approximately 2.7 % more flow than Musa Street. The performance evaluation results of TUFLOW showed 0.4916 and 0.689 as Nash–Sutcliffe, respectively, for the standard and modified SCS-CN methods. Although the flow velocity and depth were respectively increased by 3.3 % and 8.3 % under modified SCS-CN compared to the standard one, the soil water storage capacity remained constant at equal to 0.16 mm. Results revealed that the maximum soil water storage capacity was fulfilled soon through the modified SCS-CN than the standard method leading to higher flood volume and discharge. To this end, the discharge resulting from modified SCS-CN was approximately 1.5 times higher than that in the standard method under the same precipitation condition. Our findings suggest that designing any construction, mainly dams downstream, based on the modified SCS-CN estimations will provide more safety, particularly in crowded regions. Also, overflowing the excess surface runoff into the river network resulted from the increased impervious surface amplifying the flow volume, depth, and velocity across the river networks, finally leaving the area without increasing the aquifer's recharge rate. The results provide insights into possible sustainable development options and flood management in the built-up area.