چكيده به لاتين
Today, human destructive factors are far greater than the self-purifying power of the environment. Therefore, it is necessary to consider policies in order to limit these destructive factors and achieve sustainable conditions. For this purpose, the environmental impacts of a process can be quantified, important / critical points of the environment can be identified, and various methods and strategies can be proposed to reduce the destructive human effects. The water footprint of a product is the volume of fresh water used to produce a product that is fully measured in the supply chain. Water footprints can be further classified into blue water footprints, green water footprints and gray water footprints. The study area is upstream of Seymareh Dam catchment area, which has an area of 33,220 square kilometers and an average annual rainfall of 250 mm to 700 mm and an average of 480 mm. Rainfall in many areas is generally insufficient to meet crop water needs. In this research, the amount and spatial diversity of green, blue and gray water footprints of agricultural products have been calculated and the results will be published in Web GIS system. Quantitative and qualitative modeling is simulated using SWAT and then with the help of SWAT-CUP tool and SUFI2 algorithm, observational data of runoff, sediment, total nitrogen and total phosphorus for the period 2000 to 2014 and for the period 2014 to 2017 are validated. Extraction of SWAT model results from hydrological characteristics and quality of water resources on a spatial and temporal scale in the catchment area allows estimating water, green and gray water footprints. According to the results, the average green water footprint of rainfed crops was 1.05 for wheat, 0.87 for barley and 1.74 m / kg for chickpeas. The average green water footprint of irrigated crops for wheat was 0.25, barley 0.31, alfalfa 0.97 and corn 0.18 m3 / kg. The average water footprint of irrigated crops was 0.54 for wheat, 0.68 for barley, 0.54 for alfalfa and 0.41 m / kg for corn. The average gray water footprint of crops according to the standard quality of total nitrogen was equal to 602 cubic meters per hectare and based on total phosphorus was equal to 902 cubic meters per hectare. Based on the results, the green water footprint of alfalfa and barley crops in Seymareh sub-basin, the green water footprint of wheat in Gamasiab sub-basin and corn and chickpea in Qarah Su sub-basin were more than other sub-basins. Also, the water footprint of wheat, alfalfa and barley in Gamasiab sub-basin and the water footprint of corn in Seymareh sub-basin were more than other sub-basins. In the continuation of this research, a Localhost website has been designed and implemented using the Django framework, which publishes the results online and only using a browser. This website has the basic capabilities of a Web GIS system, such as zooming, changing the base map, and so on. Also with the help of Python programming, this site gives the ability to edit layers and add and remove objects for users who are allowed to edit online.
