Estimation of historical groundwater recharge rate.

Soil Research ◽  
1982 ◽  
Vol 20 (3) ◽  
pp. 255 ◽  
Author(s):  
GB Allison ◽  
JR Forth
Keyword(s):  
Groundwater Recharge ◽  
Unconfined Aquifer ◽  
Recharge Rate ◽  
European Settlement ◽  
Groundwater Samples ◽  
Groundwater Recharge Rate ◽  
Chloride Concentrations

Chloride concentrations of groundwater samples have been used to show that present-day recharge to an unconfined aquifer is approximately 2.5 times that which occurred prior to European settlement.

scholarly journals Groundwater Recharge Assessment using Geographic Information System APLIS Method in Donorojo Karst Area, Pacitan

2021 ◽  
Vol 936 (1) ◽  
pp. 012027
Author(s):  
P V Hardyani ◽  
A S Bahri ◽  
T Hariyanto ◽  
W W Parnadi ◽  
Y Rosandi ◽  
...  
Keyword(s):  
Information System ◽  
Spatial Distribution ◽  
Groundwater Recharge ◽  
Geographical Information ◽  
Karst Area ◽  
Karst Aquifers ◽  
Recharge Rate ◽  
Recharge Rates ◽  
Groundwater Recharge Rate ◽  
Aplis Method

Abstract Karst aquifers can be a source of water supply, especially for the community in Donorojo District, which is one of the areas with the worst drought crisis in Pacitan Regency and requires a sustainable solution to the problem of water needs. Therefore, the study and management of karst formations are very important because of their abundance and potential in forming subsurface aquifer karst aquifers. The recharge rate is one of the basic parameters in the management of the consumption and maintenance of this resource. In addition, the distribution of aquifer locations, aquifer characteristics, and the quality of groundwater forming the aquifer need to be known. This study aims to assess aquifers in the Karst area of Donorojo, Pacitan based on recharge rate and spatial distribution. The APLIS method can estimate surface recharge rates and present the results as a map of the spatial distribution of aquifer recharge rates by utilizing a Geographical Information System (GIS). The results of the analysis using the APLIS method, the groundwater recharge rate in the Donorojo Pacitan karst area is divided into 4 classes, namely very low, low, moderate, and high. Almost the entire Donorojo karst area has a high groundwater recharge rate, this means that the area needs to be used as a groundwater protection zone and it is important to carry out good groundwater management, especially to overcome the problem of drought.

scholarly journals Evaluation of drought impact on groundwater recharge rate using SWAT and Hydrus models on an agricultural island in western Japan

2015 ◽  
Vol 371 ◽  
pp. 143-148 ◽  
Author(s):  
G. Jin ◽  
Y. Shimizu ◽  
S. Onodera ◽  
M. Saito ◽  
K. Matsumori
Keyword(s):  
Groundwater Recharge ◽  
Groundwater Level ◽  
Groundwater Resources ◽  
Water Discharge ◽  
Swat Model ◽  
Spatial And Temporal Variation ◽  
Hydrological Process ◽  
Aquifer Recharge ◽  
Recharge Rate ◽  
Groundwater Recharge Rate

Abstract. Clarifying the variations of groundwater recharge response to a changing non-stationary hydrological process is important for efficiently managing groundwater resources, particularly in regions with limited precipitation that face the risk of water shortage. However, the rate of aquifer recharge is difficult to evaluate in terms of large annual-variations and frequency of flood events. In our research, we attempt to simulate related groundwater recharge processes under variable climate conditions using the SWAT Model, and validate the groundwater recharge using the Hydrus Model. The results show that annual average groundwater recharge comprised approximately 33% of total precipitation, however, larger variation was found for groundwater recharge and surface runoff compared to evapotranspiration, which fluctuated with annual precipitation variations. The annual variation of groundwater resources is shown to be related to precipitation. In spatial variations, the upstream is the main surface water discharge area; the middle and downstream areas are the main groundwater recharge areas. Validation by the Hydrus Model shows that the estimated and simulated groundwater levels are consistent in our research area. The groundwater level shows a quick response to the groundwater recharge rate. The rainfall intensity had a great impact on the changes of the groundwater level. Consequently, it was estimated that large spatial and temporal variation of the groundwater recharge rate would be affected by precipitation uncertainty in future.

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