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9780415416924
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"The chloride mass balance (CMB), the daily catchment water balances (WB) and the water table fluctuation (WTF) groundwater recharge estimation methods have been used to estimate groundwater recharge in a small catchment (180 Mm[superscript 2]). The study concluded that though all methods yielded the same range of recharge, between 8% and 15% of annual rainfall, they show a high spatial variability with coefficients of variation of up to 65% indicating that no single point measurements of recharge is a good indicator of regional recharge. Through water balance modelling, the study also showed that renewable groundwater resources in the Nyundo catchment have a storage period in the order of 100-120 days (3-4 months) whilst daily potential interception can be as high as 5 mm/d." "A combination of multiple regression and interception models suggest that it is feasible to obtain a first order monthly recharge estimate as a function of number of rain days in the month, average monthly rainfall, daily interception threshold, average root depth, effective porosity and average depth to water table."--BOOK JACKET.Nyagwambo is the author of 'Groundwater Recharge Processes and Groundwater Management in Trop', published 2006 under ISBN 9780415416924 and ISBN 0415416922.
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