چکیده مقاله
In arid and semi arid environments, the amount of recharge received by aquifers is far more critical to the sustainable use of water than it is in humid regions Reliable estimates of recharge, while directly affecting the accuracy of a groundwater model, are often unavailable or costly to obtain This study explores how recharge estimation and its zonal patterns could affect the performance of a groundwater simulation model For this purpose, Soil and Water Application Tool SWAT , a semi distributed hydrological model, is used to estimate recharge and its spatio temporal distribution The groundwater model is calibrated by using a two step procedure where hydraulic conductivity is estimated first in a steady state mode and is used then in a transient mode to calibrate the parameter of specific yield The methodology was applied in Dehloran Plain located in west of Iran using the MODFLOW modular flow simulator in which the PEST method is used for auto calibration Results indicated that when SWAT was used for recharge estimation, the model did relatively well in simulating monthly water table in observation wells Also, the effective recharge rates estimated by SWAT were the best estimates of the long term recharge rates in validation stage
کلیدواژهها
نویسندگان
Majid Ehtiat
College of Civil & Environmental Engineering, Amirkabir University of Technology, Tehran, Iran
Jamshid Mousavi
College of Civil & Environmental Engineering, Amirkabir University of Technology, Tehran, Iran
شیوه ارجاع
Ehtiat, Majid and Mousavi, Jamshid,1392,SWAT-based Recharge Estimation in Inverse Groundwater Modeling,5th Iranian Water Resources Management Conference ,Tehran
ارائهشده در
مجموعه مقالات پنجمین کنفرانس مدیریت منابع آب ایران29 بهمن 1392 · تهران