edris morsali; nader heydari; Abbas Zare; Hamidreza Hatami
Abstract
Infrastructure factors provide the main basis for agricultural production and activity under conditions of limited water resources and are considered as strategic requirement for improving this sector. The aim of this research was recognition, determination of importance and level of effectiveness, and ...
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Infrastructure factors provide the main basis for agricultural production and activity under conditions of limited water resources and are considered as strategic requirement for improving this sector. The aim of this research was recognition, determination of importance and level of effectiveness, and investigating the relation of infrastructural components and indicators in improving agricultural water productivity. The method used for this research was field surveying type in which, after documentary and library studies, a self-made questionnaire was developed for interview with professionals and practitioners to gather their opinion on the importance level of different indicators using a Likert Scale, followed by analysis of questions and assumptions. The research indicated the relation and effectiveness level of variables by means of structural equation modeling and Smart PLS software. According to the obtained results, emphasis of infrastructures were on the side of agricultural water supply, while lack of demand oriented approach, process, systematic, and holistic view were among the main problems of the infrastructures. Also, components such as “downstream instrumentation of the fields and wells with water measurement devices and controlling irrigation water” and “share of downstream farms equipped with systems for lowering water consumption out of the total cultivated area” were among the most effective factors. It was shown that by taking other variables as constant, agricultural water infrastructures have been effective (about 87.6%) on improvement of agricultural water productivity, and there is a positive and meaningful relation between each one of the components and related indicators.
ahmad ali keykha; Mahdieh Mosnen; Mahmood Saboohi
Abstract
Water is one of the scarcest inputs in most countries and is used in agricultural production. In Iran, where the average annual rainfall is 240 mm with sporadic distribution and spatial and temporal variations, this input becomes more important. Sistan ...
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Water is one of the scarcest inputs in most countries and is used in agricultural production. In Iran, where the average annual rainfall is 240 mm with sporadic distribution and spatial and temporal variations, this input becomes more important. Sistan and Baluchistan is a dry province of the country that faces water shortage problem in many years. To solve water supply fluctuations and scarcity in Sistan region, Chahnimeh water reservoir was established to store water in wet seasons and, consequently, decrease damages in the dry seasons. The aim of this study was modeling of the Chahnimeh water reservoir management using goal programming to determine optimal water for domestic, agricultural, and environmental sector and its sensitivity analysis. Therefore, a matrix with 142 in 154 dimension of aims and systemic and goal constraints were constructed. Then, this model was solved using goal programming. Considering the historical data, results show that water requirement of domestic and environment sectors can be provided, but some agricultural water may not be supplied. Therefore, if in the first six months of the year water is stored in Chahnimeh reservoir, in the next six months, there would be no water shortage, Also, if irrigation efficiency increases, decision makers can increase the cultivated area.