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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Water Sciences Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Geographic Information System,Water use,Productivity indexes,Gross benefit,Values added
- چکیده:
- چکیده انگلیسی: Although the agricultural sector consumes more than 90% of the extracted water, its efficiency is lower than other sectors. Also, according to the population growth and critical role of food security, and the necessity to supply water to other sectors, an increasing pressure to save water, optimized consumption and increasing water use productivity in agriculture will occur in the future. Nowadays improving water use productivity and producing more crops per water unit consumed are the main objectives of agricultural activities. There are several indexes to evaluate the water use productivity in agriculture. Hence, investigation on the capabilities and deficiencies of each index is necessary. In this study, four indexes of water use productivity including produced crop per one cubic meter of water (CPD), gross benefit per one cubic meter of water (BPD), net benefit per one cubic meter of water (NBPD) and benefit to cost ratio for three major crops in Iran, namely wheat, barley and potato are evaluated and located with geographic information system (GIS). Results show that by combining all four indexes, wheat in northern and western areas and Khuzestan province, barley in Khorasan Razavi province and northern and central areas and potato in Hamedan province and northeast areas have a better distribution in Iran.
- انتشار مقاله: 09-02-1392
- نویسندگان: Mohammad Ali Bayat,Hossein Babazadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: Advance Researches in Civil Engineering
- نوع مقاله: Journal Article
- کلمات کلیدی: Hydrologic Time Series,Box-Jenkins Approach,Arima Model,Karkheh river
- چکیده:
- چکیده انگلیسی: Autoregressive integrated moving average (ARIMA) models are appropriate for the annual streamflows (annual peak and maximum and also mean discharges) of the Karkheh River at Jelogir Majin station of Karkheh river basin in Khuzestan province in western Iran, through the Box- Jenkins time series modelling approach. In this research among the suggested models interpreted from ACF and PACF, ARIMA(4,1,1) for all annual streamflows satisfied all tests and showed the best performance. The model forecasted streamflow for ten leading years showed the ability of the model to forecast statistical properties of the streamflow in short time in future. The SAS and SPSS softwares were used to implement of the models.
- انتشار مقاله: 10-11-1397
- نویسندگان: Karim Hamidi Machekposhti,Hossein Sedghi,Abdolrasoul Telvari,Hossein Babazadeh
- مشاهده