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Reliable yield of unconfined aquifers

Content Provider	Scilit
Author	Khan, L. R. Mawdsley, J. A.
Copyright Year	1988
Description	Journal: Hydrological Sciences Journal The various definitions of aquifer yield are reconsidered and criticized because the risk of shortages is not quantified. The concept of reliable yield is introduced and a model is proposed that can be used to estimate the yield of an unconfined aquifer to a specified annual reliability. The model is a lumped model which is suitable for the preliminary estimates of aquifer yield required at the early planning stage of water resource development. The model requires as input the recharge for various durations which will be exceeded a specified percentage of the time. Standard statistical analysis of the extreme low flow events of various durations is used to obtain these values. Using recharge data from several unconfined aquifers in the UK, the lognormal distribution was found to be the most suitable distribution to describe the recharge. The lumped yield model requires several assumptions. These are discussed and the sensitivity of the yield to them was investigated using data from a Chalk catchment in the UK. The yield was found to be sensitive to several of the assumptions.
Related Links	http://www.tandfonline.com/doi/pdf/10.1080/02626668809491235?needAccess=true
Ending Page	171
Page Count	21
Starting Page	151
ISSN	02626667
e-ISSN	21503435
DOI	10.1080/02626668809491235
Journal	Hydrological Sciences Journal
Issue Number	2
Volume Number	33
Language	English
Publisher	Informa UK Limited
Publisher Date	1988-04-01
Access Restriction	Open
Subject Keyword	Journal: Hydrological Sciences Journal Water Science and Technology Reliable Yield Model Requires Unconfined Aquifers Aquifer Yield Water Resource Various Durations
Content Type	Text
Subject	Water Science and Technology

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