Alluvial Aquifers(冲积含水层)研究综述
Alluvial Aquifers 冲积含水层 - Arsenic contamination of alluvial aquifers of the Bengal delta plain causes a serious threat to human health for over 75 million people. [1] The study underscores that the lateral and unaccounted recharge must not be ignored in the urban landscape underlain by alluvial aquifers and with non-hydrologic unit boundaries. [2] Alluvial aquifers (unadjusted odds ratio (UOR) = 14. [3] Alluvial aquifers are highly vulnerable to contamination, especially in areas with peri-urban occupation and on-site sanitation systems. [4] The residence time of groundwater in the alluvial aquifers was also found out. [5] Alluvial aquifers are generally highly productive in terms of groundwater and are therefore particularly exploited. [6] The results of the chemical analyses indicated elevated concentrations of chloride and nitrate in the limestone and alluvial aquifers, particularly along the coast. [7] In the present study, groundwater suitability for domestic and irrigation purposes was analyzed in the alluvial aquifers of the Bist-Doab region of Punjab, India, using various indices such as WQI, WAWQI, MCDA, RSC, SAR, PI, %Na, KR, MH, PS, K, and Ka. [8] Several studies have evaluated the impact of climate change on the alluvial aquifers; however, no research has been carried out on a small-scale aquifer without any human influences and pumping wells. [9] Study focus This study investigates the trends of groundwater levels (GWLs), the memory effect of alluvial aquifers, and the response times between surface water and groundwater across the Vietnamese Mekong Delta (VMD). [10] Alluvial aquifers by nature are complex caused by varied depositional environments. [11] Nigeria is a country endowed with alluvial aquifers that occur along major river valleys, in low lying areas which are frequent to flooding during the rainy season. [12] This research aims at analyzing the relationship between the hydraulic conductivity and the formation factor in alluvial aquifers. [13] Much of this knowledge has come from studies conducted either in fractured rock aquifers or alluvial aquifers. [14] Arsenic (As) mobilization in alluvial aquifers is facilitated by microbially catalyzed redox transformations that depend on the availability of electron acceptors (EAs). [15] The Ilam-Sarvak formation primarily behaves like the surface water with low resilience (conduit flow, low storage), and the Asmari formation portrays the features of the alluvial aquifers with high resilience (diffuse flow, large storage). [16] In this present study, five agricultural blocks of Dakshin Dinajpur district, West Bengal, India, were studied to check the vulnerability of the alluvial aquifers. [17] 5 mg/l have been found from alluvial aquifers. [18] Groundwater in the study area occurs in the alluvial aquifers and has an intense agricultural production. [19] To reveal the groundwater chemistry, contaminants sources and health threats in alluvial aquifers, 81 groundwaters were collected from a typical alluvial fan plain of northern China for nitrogen, fluoride and major ions analysis. [20] The evaluation of the sorption behavior of contaminant transport mechanisms such as heavy metals is essential to assess the risk of contamination of alluvial aquifers. [21] Stratigraphy is a fundamental component of floodplain heterogeneity and hydraulic conductivity and connectivity of alluvial aquifers, which affect hydrologic processes such as groundwater flow and hyporheic exchange. [22] Alluvial aquifers are the main source of groundwater worldwide. [23] Groundwater options may utilise high borehole yields possible from alluvial aquifers, grossly under-exploited by hand pumps. [24] Arsenic transport in alluvial aquifers is usually constrained due to arsenic adsorption on iron oxides. [25] Human interferences have caused groundwater contamination in alluvial aquifers which subsequently affects the health of exposed population. [26] Overall, this hybrid method for RNA analysis provided cultivation-independent information on the in-situ carbon sources of active subsurface microbes and reinforced the importance of autotrophy and the preferential utilization of dissolved over sedimentary organic matter in alluvial aquifers. [27] These geochemical interactions are complex but can be used to determine controls on anomalously high U in alluvial aquifers. [28] Achieving the sustainable goals for management and protection of groundwater resources in shallow aquifers in Slovenia was evaluated with stress indicators for the alluvial aquifers of groundwater bodies with the highest quantitative and qualitative pressures: Savska kotlina with Ljubljansko Barje, Savinjska kotlina, Krška kotlina, Dravska kotlina and Murska kotlina. [29] In this area, water resources are represented by altered and fissured basement and alluvial aquifers. [30] Chlorine-36 abundances and stable chlorine isotope ratios ( 37 Cl/ 35 Cl) were analyzed to decipher sources of chloride and to estimate subsurface residence times of groundwaters from the Nubian Sandstone Aquifer System (NSAS), alluvial aquifers, and fractured basement aquifers in the Eastern Desert of Egypt. [31] Groundwater arsenic contamination is recently reported in the alluvial aquifers of Indus deltaic plain. [32] The highest concentrations appear in alluvial aquifers in arid northern Mexico, where high-silica volcanic rock likely releases both arsenic and fluoride to the groundwater. [33] Arsenic contaminated shallow aquifers evaluation, mitigation, and management strategies are the challenging task to all the hydrologist and provide a safe drinking water demand in the Holocene age, alluvial aquifers. [34] An important option for further investigation is the greater use of alluvial aquifers for temporary water storage. [35] Therefore, the aquifer geometry, recharge and rainfall which define the hydro-dynamics of alluvial aquifers are important to understand in view of sustainable groundwater management. [36]孟加拉三角洲平原冲积含水层的砷污染对超过 7500 万人的人类健康造成严重威胁。 [1] 该研究强调，在冲积含水层和非水文单元边界的城市景观中，不能忽视横向和下落不明的补给。 [2] 冲积含水层（未调整优势比 (UOR) = 14。 [3] 冲积含水层极易受到污染，尤其是在具有城郊地区和现场卫生系统的地区。 [4] 还发现了地下水在冲积含水层中的停留时间。 [5] 冲积含水层的地下水产量通常很高，因此特别被开发利用。 [6] 化学分析结果表明石灰岩和冲积含水层中氯化物和硝酸盐的浓度升高，特别是在沿海地区。 [7] 在本研究中，使用 WQI、WAWQI、MCDA、RSC、SAR、PI、%Na、KR 等各种指标分析了印度旁遮普省 Bist-Doab 地区冲积含水层中地下水对生活和灌溉的适用性、MH、PS、K 和 Ka。 [8] 几项研究评估了气候变化对冲积含水层的影响；然而，还没有对没有任何人为影响和抽水井的小规模含水层进行研究。 [9] 研究重点 本研究调查了地下水位 (GWL) 的趋势、冲积含水层的记忆效应以及越南湄公河三角洲 (VMD) 地表水和地下水之间的响应时间。 [10] 冲积含水层本质上是复杂的，由不同的沉积环境造成。 [11] 尼日利亚是一个拥有冲积含水层的国家，这些含水层出现在主要河谷沿线的低洼地区，在雨季经常发生洪水。 [12] 本研究旨在分析冲积含水层的导水率与形成因子之间的关系。 [13] 这些知识大部分来自对裂隙岩石含水层或冲积含水层的研究。 [14] 微生物催化的氧化还原转化促进了冲积含水层中砷 (As) 的迁移，该转化取决于电子受体 (EA) 的可用性。 [15] Ilam-Sarvak 地层主要表现为低回弹性的地表水（管道流量、低蓄水量），而 Asmari 地层则描绘了具有高回弹性的冲积含水层（漫流、大蓄水量）的特征。 [16] 在本研究中，研究了印度西孟加拉邦 Dakshin Dinajpur 区的五个农业区，以检查冲积含水层的脆弱性。 [17] 从冲积含水层中发现 5 mg/l。 [18] 研究区地下水出现在冲积含水层中，农业生产密集。 [19] 为了揭示冲积含水层中的地下水化学、污染物来源和健康威胁，从中国北方一个典型的冲积扇平原采集了 81 种地下水，用于氮、氟和主要离子分析。 [20] 评估重金属等污染物传输机制的吸附行为对于评估冲积含水层的污染风险至关重要。 [21] 地层是洪泛区非均质性、导水率和冲积含水层连通性的基本组成部分，影响地下水流动和潜流交换等水文过程。 [22] 冲积含水层是全球地下水的主要来源。 [23] 地下水选项可以利用冲积含水层的高钻孔产量，而手动泵的开采量严重不足。 [24] 由于砷在氧化铁上的吸附作用，冲积含水层中的砷迁移通常受到限制。 [25] 人为干扰已导致冲积含水层中的地下水受到污染，进而影响暴露人群的健康。 [26] 总体而言，这种用于 RNA 分析的混合方法提供了与培养无关的活性地下微生物原位碳源的信息，并强调了自养的重要性和优先利用冲积含水层中溶解的沉积有机物的重要性。 [27] 这些地球化学相互作用很复杂，但可用于确定对冲积含水层中异常高 U 的控制。 [28] 斯洛文尼亚浅层含水层地下水资源管理和保护的可持续目标通过定量和定性压力最高的地下水体冲积含水层的压力指标进行评估：Savska kotlina with Ljubljansko Barje、Savinjska kotlina、Krška kotlina、Dravska kotlina和 Murska kotlina。 [29] 在该地区，水资源以蚀变和裂隙的地下室和冲积含水层为代表。 [30] 分析了 Chlorine-36 丰度和稳定氯同位素比 ( 37 Cl/ 35 Cl) 以破译氯化物的来源，并估计努比亚砂岩含水层系统 (NSAS)、冲积含水层和断裂基底含水层中地下水的地下停留时间埃及东部沙漠。 [31] 印度河三角洲平原冲积含水层最近报道了地下水砷污染。 [32] 最高浓度出现在干旱的墨西哥北部的冲积含水层中，那里的高硅火山岩可能会向地下水释放砷和氟化物。 [33] 砷污染的浅层含水层评估、缓解和管理策略是所有水文学家面临的一项艰巨任务，并为全新世冲积含水层提供安全的饮用水需求。 [34] 进一步调查的一个重要选择是更多地利用冲积含水层进行临时蓄水。 [35] 因此，从可持续地下水管理的角度来看，定义冲积含水层水动力的含水层几何形状、补给量和降雨量对于理解非常重要。 [36]
Shallow Alluvial Aquifers 浅冲积含水层
The groundwater from shallow alluvial aquifers of northern Kelantan, Malaysia, was analysed for stable isotopes (δ18O and δ2H) during northeast and southwest season to assess the dynamics of the recharge processes. [1] In shallow alluvial aquifers characterized by coarse sediments, the evapotranspiration rates from groundwater are often not accounted for due to their low capillarity. [2] The results of our research show that ERT coupled with implicit modeling tools provides information that can significantly help to identify aquifer geometry and characterize the saltwater intrusion of shallow alluvial aquifers. [3] In this study, the spatial distribution and hydrochemistry of arsenic (As) in shallow alluvial aquifers of Bidyananda and Nazimkhan Union of Rajarhat opazilla, Kurigram district of Bangladesh have been evaluated. [4] In the context of demand-side management and geothermal energy production, our proposal is to store thermal energy in shallow alluvial aquifers at shorter frequencies than classical seasonal aquifer thermal energy storage. [5] The investigation of aquifer geometry via development of a three-dimensional geological model combined with an assessment of hydraulic data provided important insights on groundwater flow paths and helped to identify areas where bedrock aquifers interact with shallow alluvial aquifers and streams. [6]在东北和西南季节，分析了来自马来西亚吉兰丹北部浅层冲积含水层的地下水的稳定同位素（δ18O 和 δ2H），以评估补给过程的动态。 [1] 在以粗沉积物为特征的浅层冲积含水层中，由于其低毛细作用，地下水的蒸散率通常不被考虑。 [2] 我们的研究结果表明，ERT 与隐式建模工具相结合提供的信息可以显着帮助识别含水层几何形状并表征浅层冲积含水层的盐水入侵。 [3] 在这项研究中，评估了孟加拉国库里格拉姆区 Rajarhat opazilla 的 Bidyananda 和 Nazimkhan Union 浅层冲积含水层中砷 (As) 的空间分布和水化学。 [4] 在需求侧管理和地热能生产的背景下，我们的建议是以比经典季节性含水层热能存储更短的频率将热能存储在浅层冲积含水层中。 [5] 通过开发 3D 地质模型结合水力数据评估对含水层几何形状的研究为地下水流动路径提供了重要见解，并有助于确定基岩含水层与浅层冲积含水层和溪流相互作用的区域。 [6]