Abstract
Drought has always been one of the crucial water management issues especially in a dry climate areas. Recently this matter is emerging also in the Czech Republic and in other parts of the temperate and continental climate zone. With progressing climate changes, we can expect that the current water management systems will often have to adapt to new conditions. This paper offers an evaluation of artificial recharge as a drought mitigation method in areas with crystalline bedrock. The core of the study is a pilot location model solution, which provided a tool to assess the efficiency of artificial recharge, operated in order to improve water budged of a shallow hard-rock aquifer. The results of simulations confirmed suitability of artificial recharge through infiltrations wells or ponds, which significantly enhanced water budged of the experimental catchment and improved its potential as a water resource.
Highlights
The effect of climate change and long term drought on water resources is becoming an important water management issue for many regions worldwide, including Central Europe
The purpose of our study is to provide expert outcomes about effectiveness of artificial recharge in a mountainous hard rock region and its application as one of the groundwater withdrawals mitigation methods
The combination of hydrologic and hydraulic modeling provided the results to assess the impact of drought and its possible mitigation method in specific conditions of mountainous hard rock shallow aquifer
Summary
The effect of climate change and long term drought on water resources is becoming an important water management issue for many regions worldwide, including Central Europe. Higher temperatures and changes in yearly temperature and precipitation patterns considerably affect local water supply systems. A statistically significant raise of surface evaporation has been recorded in Central Europe during last decades and because of the rising temperatures this trend is expected to continue in the future (Dezsi et al 2018; Orth et al 2016; Teuling et al 2009; Seneviratne et al 2006). According to Kašpárek (2007), the annual increase of evaporation in the area is approximately 5 mm. The same source is presenting a record of local changes in seasonal distribution of rainfall, with a decrease in summer precipitation and increase in winter precipitation.
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