majid khazayi; Iman Saleh; reza bayat; Shokr allah Absallan
Abstract
The concept of water productivity is to produce the best and most products by spending the lower amount of water. in this study water productivity was investigated with field surveys, field measurements and remote sensing analysis. For this purpose, in the first stage, water resources condition of the ...
Read More
The concept of water productivity is to produce the best and most products by spending the lower amount of water. in this study water productivity was investigated with field surveys, field measurements and remote sensing analysis. For this purpose, in the first stage, water resources condition of the Basht aquifer investigated. in the next step, the cultivated area of Basht aquifer was investigated using Sentinel-2 satellite images in Google Earth Engine. Then, the agricultural condition of the aquifer investigated through questionnaire by farmers and experts. In the next step, the water requirement of the current cultivation pattern was calculated by the Penman-Monteith method. Finally, by evaluating the products in terms of productivity indicators, the water productivity of different products was determined. Penman-Monteith method calculations indicated that the water requirements of the aquifer dominant crops, including Citrus fruits, wheat, barley, corn, rapeseed, watermelon, branches, legumes and alfalfa respectively were 9170, 5630, 4821, 7863, 5411, 9291, 20234, 5225, 14083 cubic meters per hectare, respectively. In total, the amount of water consumed by the agricultural products in aquifer Basht is 45 million cubic meters, that approximately equivalent to 1 cubic meter per square meter of the aquifer cultivation area and and this amount is much more than the aquifer agriculture programmable water (17 million cubic meters).
Hesam Ghodousi; Samira Sadaat Morsali
Abstract
Crop pattern has significant effect on optimum use of water resources and agricultural management. Present research accomplished to achieve optimum crop pattern in Aharchai Basin located in the downstream of Sattarkhan Dam. The study area is about 3000 ha using traditional irrigation method, ...
Read More
Crop pattern has significant effect on optimum use of water resources and agricultural management. Present research accomplished to achieve optimum crop pattern in Aharchai Basin located in the downstream of Sattarkhan Dam. The study area is about 3000 ha using traditional irrigation method, wherein low irrigation efficiency and water shortage are the most important problems. In order to determine optimum crop pattern and to provide a suitable way to increase agricultural benefit and productivity, a linear programming model in both cases of the current and improved irrigation system conditions was simulated in the Mathematica software. After simulation, in order to maximize benefits, the area of each product was determined through two different simulation states. Results showed that if agricultural lands employ modern irrigation methods, the benefit of agricultural activities would increase by 30%, i.e. it would rise from 98 to 128 billion Riyals in a year.
