5564

338 دكتري

دكتري

آبياري و زهكشي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1389

شانزده،282ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

فرهاد موسوي، جهانگير عابدي كوپايي

مجيد افيوني، كريم عباسپور،سعيد اسلاميان

27/9/89

عبدالمجيد لياقت،حميدرضا صفوي،امير حسين خوش گفتارمنش

مهندسي كشاورزي

ID338 دكتري

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Application of SWAT and DRASTIC models to investigate nitrate pollution of groundwater and best management practices in Hamadan Bahar plain Samira Akhavan Akhavan samira@yahoo com College of Agriculture Isfahan University of Technology Isfahan 84156 83111 Iran1st Sayed Farhad Mousavi mousavi@cc iut ac ir2nd Jahangir Abedi Koupai koupai@cc iut ac ir1st Majid Afyuni afyuni@cc iut ac ir2nd Karim C Abbaspour abbaspour@eawag ch3rd Sayed Saeid Eslamian Eslamian@cc iut ac ir Isfahan University of Technology College of Agriculture Department of Water Engineering Isfahan 84156 83111 Iran Isfahan University of Technology College of Agriculture Department of Soil Science Isfahan 84156 83111 Iran Eawag Swiss Federal Institute of Aquatic Science and Technology 8600 D bendorf Switzerland AbstractOne of the major causes of groundwater pollution in Hamadan Bahar aquifer in western Iranis nonpoint sources resulting from agricultural activities Withdrawal of over 88 of drinkingwater from aquisers necessisates a better management of water supplies The objectives ofthis study were to construct groundwater vulnerability maps based on DRASTIC model investigate temporal and spatial variability of nitrate leaching with SWAT model andconsider different scenarios for reducing nitrate leaching in critical areas of Hamadan Baharwatershed The results showed that performance of the conditioned DRASTIC modelimproved significantly R2 0 52 over the intrinsic R2 0 12 and specific R2 0 19 models in predicting the groundwater nitrate concentration SWAT model was calibrated andvalidated using SUFI 2 procedure based on measured discharge and nitrate at the outlet of thewatershed and crop yield The calibration and validation results were quite satisfactory About36 of Hamadan Bahar plain has a nitrate leaching rate of 100 595 kg N ha 1 year 1 Amongthe considered scenarios the S6 scenario application of common amount of urea without henmanure was selected as the best management practice for this watershed Key Words Nitrate pollution groundwater SWAT DRASTIC SUFI2 BMPIntroduction In Hamadan western Iran intensive agriculture traditional methods of handling sewage slaughterhouses and animal farming are principal causes of water pollution on a regionalscale Agriculture relies greatly on N fertilizers to increase crop yield About 90 of thecroplands are used to grow two main crops wheat and potato These lands are located in thevicinity of drinking water wells In the past 30 years the water table in this region hasdropped by 50 m This decrease in water table is accompanied by an increase in theapplication of fertilizers As reported by previous studies 5 6 and 8 nitrate is the maingroundwater pollutant in this region As drinking water supply comes mainly fromgroundwater sources public water supplies of the region must be protected DRASTIC 2 is a model used to assess groundwater vulnerability to potentialcontaminants This model is defined as a composite description of the most important

فرهاد موسوي، جهانگير عابدي كوپايي

مجيد افيوني، كريم عباسپور،سعيد اسلاميان

عبدالمجيد لياقت،حميدرضا صفوي،امير حسين خوش گفتارمنش