The Ogallala Aquifer is an important source of irrigation water on the Texas High plains; however, significant decreases in saturated thickness threaten its future use for irrigation. A better understanding of the roles of playas, ephemeral surface ponds, in aquifer recharge is needed to establish levels of withdrawals that will meet either established desired future conditions or sustainabilit...

Abstract Groundwater use has significantly increased in the rapidly urbanising city of Kumasi, Ghana. But there is a lack understanding whether groundwater system can sustain growing demand future amidst climate change and rapid urbanisation. Using remote sensing datasets water balance approach, this study estimated recharge assessed how urbanisation affected its sustainability. Sustainability ...

Recently recharged water (defined here as <60 years old) is generally the most vulnerable part of a groundwater resource to nonpoint-source nitrate contamination. Understanding at the appropriate scale the interactions of natural and anthropogenic controlling factors that influence nitrate occurrence in recently recharged groundwater is critical to support best management and policy decisions t...

This special issue is aimed at providing examples of current research and other activities related to the assessment of the impacts of climate change on water resources in developing economies. The recent 4 th Assessment Report by the IPCC [1] has put to rest any lingering doubts that our climate is changing and that the changes are largely due to human activities. The impacts of climate change...

This paper aims to determine how both climate and local drivers, such as groundwater withdrawals influence surface water - interactions in Groundwater Dependent Ecosystems (GDEs). We studied the hydroperiod eight of most representative ponds Doñana National Park (southern Spain) during a 21-year period. analyzed average flooded phase each pond well depth piezometric level nearby piezometers. In...

Rising demand for food, fiber, and biofuels drives expanding irrigation withdrawals from surface water and groundwater. Irrigation efficiency and water savings have become watchwords in response to climate-induced hydrological variability, increasing freshwater demand for other uses including ecosystem water needs, and low economic productivity of irrigation compared to most other uses. We iden...

Evaluating the sustainability of water uses in shallow aquifers is fundamental for both environmental and socio-economic reasons. Groundwater models are the main tools to sustain informed management plans, yet simulation results are affected by both epistemic and parametric uncertainties. In this study, we aim at investigating the effect of model uncertainties on three assessment criteria: dept...

Increased groundwater demand is causing aquifer declines that impact viability of groundwater-dependent ecosystems (GDEs) like springs and phreatophyte communities. To understand which communities may be stressed by level in Oregon Nevada, we assessed trends nearby monitoring wells. Very few were near wells with adequate data. Less than 1% &amp;gt;50,000 Nevada within 800 m analyzed wells, only...