Evaluating the Drainage Process of Agricultural Lands in Golestan Province based on Agricultural Drainage Reuse

Subject Areas : WATER RESOURCES

Mahdi Mardanifar ¹ , Mahmoud Ansar ² , Marzieh Parvar ³ , دنیائی Donyaii ⁴ , Seyed Erfan Hosseini ⁵

1 - Master's Degree in Hydraulic Structures, Bargab Consulting Engineers
2 - Master's Degree in Engineering and construction management, Bargab Consulting Engineers,
3 - Master in hydrogeology, Bargab Consulting Engineers
4 - Water Resources Expert - Golestan Regional Water Company
5 - Assistant Professor of Civil Engineering Department, Gorgan Branch, Islamic Azad University, Gorgan, Iran

Received: 2021-08-22 Accepted : 2022-11-23 Published : 2022-12-22

Keywords: Groundwater, Second crop, Drainage water, Subsurface Drainage, Reuse of Drainage,

Abstract :

Conservation of water and soil resources in Iran is one of the most important issues in the field of water, agriculture and food security. In this research, a practical example of the results of pilot implementation of a subsurface drainage plan in Karimabad village, Gorgan, was investigated. This project includes 100-hectare subsurface drainage using 100 mm diameter PVC pipes with 50 m intervals for laterals and 200 mm in diameter of collectors as well as concrete manholes with 800 mm internal diameter. In this study, while evaluating before and after the implementation of the project, the results were recorded. The results showed that the yield of wheat, paddy, cotton and canola increased by 12%, 36%, 28% and 39% respectively, after the project implementation. In addition, the possibility of second cultivation will be provided for farmers followed by the disappearance of wetlands in agricultural lands at the end of project. Moreover, the effect of groundwater draining on the effluent quality will provide the possibility of reusing irrigation drains and reducing the groundwater discharge, which will be very effective in reducing water stress in the region.