Alluvial aquifer characterisation and resource assessment of the Molototsi sand river, Limpopo, South Africa

Alluvial aquifer characterisation and resource assessment of the Molototsi sand river, Limpopo, South Africa
复制标题

南非林波波省莫洛托西沙河冲积含水层特征和资源评估

DOI:
10.1016/j.ejrh.2018.09.002
复制
发表时间:
2018
期刊:
影响因子:
4.6
通讯作者:
Walker D
Walker D
中科院分区:
经济学2区
文献类型:
--
作者:
Walker D

文献摘要

参考文献

被引文献

相似文献

研究区域南非林波波的莫洛托茨沙河。研究重点临时沙河在世界干旱地区很常见,通常为传统水源无法获得的地方提供水源。然而,这些冲积含水层在文献中很少被描述。通过广泛的实地调查,可以估计蓄水量和冲积含水层的特征。计算的冲积含水层特性包括水力传导性为20-300 m/d,孔隙度为38-40%,含水层厚度为0-6 m。堤坝和其他次生作物通常将含水层隔开,但不形成流动障碍。地下水水位、水化学和稳定同位素特征的对比揭示了深层地下水(发生在破碎的变质岩中)与冲积含水层之间的水力脱节。冲积含水层的主要补给过程是从集水区上游的洪流支流产生的地表径流。目前只提取了一小部分可用存储空间,小农灌溉和其他用途有可能得到更大的开发。
Study regionMolototsi sand river, Limpopo, South Africa.Study focusEphemeral sand rivers are common throughout the world’s dryland regions, often providing a water source where more conventional sources are unavailable. However, these alluvial aquifers are poorly represented in the literature. Extensive field investigations allowed estimation of stored water volume and characterisation of an alluvial aquifer.New hydrological insights for the regionComputed alluvial aquifer properties included hydraulic conductivity of 20–300 m/d, porosity of 38–40%, and aquifer thickness of 0–6 m. Dykes and other subcrops commonly compartmentalise the aquifer though do not form barriers to flow. A hydraulic disconnect between deep groundwater (occurring in fractured metamorphic rocks) and the alluvial aquifer was revealed by groundwater levels and contrasting hydrochemistry and stable isotope signatures. The dominant recharge process of the alluvial aquifer is surface runoff occurring from torrential tributaries in the catchment’s upper reaches. A fraction of available storage is currently abstracted and there exists potential for greater exploitation for smallholder irrigation and other uses.
DOI: --
发表时间: 1992-06
影响因子: 10.9
作者:
Miloš Vuković;A. Soro
通讯作者: Miloš Vuković;A. Soro
小型冲积含水层地下水-地表水相互作用和尺度关系的案例研究
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
D. Love;W. Hamer;R. Owen;M. Booij;S. Uhlenbrook;A. Hoekstra;P. Zaag
通讯作者: P. Zaag
集热井系统在沙河试点项目中应用的最终报告
DOI: --
发表时间: 1998
期刊:
影响因子: --
作者:
J. Davies;P. Rastall;R. Herbert
通讯作者: R. Herbert
DOI: --
发表时间: 2016
期刊:
影响因子: --
作者:
S. C. Mpala;A. Gagnon;M. Mansell;S. Hussey
通讯作者: S. Hussey
纳米比亚 Kuiseb 河沿岸植被的水关系
DOI: --
发表时间: 1993
期刊:
影响因子: --
作者:
B. Bate;G. C. Walker
通讯作者: G. C. Walker