IAHR International Groundwater Symposium , 2012-11-19

Title : ( Estimation of groundwater recharge using various methods in Neishaboor Plain, Iran )

Authors: Tayebeh Ahmadi , Ali Naghi Ziaei , Kamran Davary , Alireza Faridhosseini , Azizallah Izady , A. Rasoulzadeh ,

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Recharge rate is the most important component in water balance computation and ground-water modeling. Also, it is the critical factor in optimal planning and management of groundwater resources in arid and semi arid regions such as the eastern part of Iran. There are different techniques to quantify the recharge amount. Each of these methods has been developed in separate hydro-geological conditions and they will estimate completely different recharge value in an identical region. In this study, based on available hydro-geological information, three of these methods were selected to estimate the groundwater recharge. All of these methods are based on the water balance principle (rainfall-groundwater level relationship), including WTF (Water Table Fluctuation), DHB (Distributed Hydrological Budget) and HB (Hydrological Budget). These methods were useful, easy to be utilized, cost effective, simple, requiring few non-deterministic data such as groundwater level measurements, rainfall, aquifer properties, and groundwater extraction datasets. These methods were used to provide the percentage of irrigation return flow and the precipitation contribution to natural groundwater recharge. In order to apply the first two methods (WTF and DHB that are distributed techniques), the study area was classified to polygons based on the existing observation wells. Then, the natural recharge rate was estimated for each Thiessen polygon on a monthly scale. Utilizing these three methods, the groundwater level was simulated and also an optimization technique was applied to minimize the Root Mean Square Error (RMSE) between the simulated and observed groundwater level. The results showed that the simulated groundwater level matched well with the observed amount. An annual average recharge rate for Neyshabour plain, using WTF, DHB and HB was estimated at 228, 269 and 354 MCM, respectively. Finally, the estimated groundwater recharge of each method was compared and the results showed that thr WTF and DHB methods provided more reliable groundwater recharge.


, groundwater recharge, WTF, hydrological budget, rainfall, Neishaboor,
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author = {Ahmadi, Tayebeh and Ziaei, Ali Naghi and Davary, Kamran and Faridhosseini, Alireza and Izady, Azizallah and A. Rasoulzadeh},
title = {Estimation of groundwater recharge using various methods in Neishaboor Plain, Iran},
booktitle = {IAHR International Groundwater Symposium},
year = {2012},
keywords = {groundwater recharge; WTF; hydrological budget; rainfall; Neishaboor; Iran},


%0 Conference Proceedings
%T Estimation of groundwater recharge using various methods in Neishaboor Plain, Iran
%A Ahmadi, Tayebeh
%A Ziaei, Ali Naghi
%A Davary, Kamran
%A Faridhosseini, Alireza
%A Izady, Azizallah
%A A. Rasoulzadeh
%J IAHR International Groundwater Symposium
%D 2012