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2 Journal of Water and Land Development

2 2022

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The effect of various irrigation technologies and strategies on water resources management

Dwijendra Ngakan Ketut Acwin, Abbas Zaheer, Salih Salih Mahmood, Opulencia Maria Jade Catalan, Morozova Larisa, Sergushina Elena S., Asnan Muhammad Noor, Kadhim Mustafa Mohammed, Kavitha Manoharan

Journal of Water and Land Development

2022

no. 53

143--147

Today, the uncontrolled abstraction of surface water and groundwater resources has created adverse consequences, which include: extinction of living organisms, land subsidence, salinity of coastal aquifers, increased pumping energy. Therefore, the need to manage available water resources is felt more than ever. Among the various water uses (agriculture, drinking, and industry), agriculture accounts for the bulk of water consumption. Due to the climate change and the growing population, determining the appropriate strategy and technology for irrigation is necessary. In the current study, a simulation model is used to numerically simulate the dynamics of daily soil moisture during the potato crop growing season and to estimate crop production and economic benefits. For climatic data, daily observations of a meteorological station have been used. Results and analyses have been presented for all cases of micro and traditional irrigation methods and agricultural management strategies of non-stress irrigation, low irrigation, and rainfed cultivation. The results showed that in the non-stress irrigation method, crop production and net profit are almost equal in both traditional and micro methods. In the low irrigation method, microtechnology has made crop production and net profit 1.75 times more than traditional technology, which indicates the impact of irrigation technology on crop production.

Comparison of lateral spillway and morning glory spillway performance in flood control

Sukerta I Made, Chen Tzu-Chia, Mardizal Jonni, Salih Salih Mahmood, Zulkarnain Isnaini, Islam Md Zahidul, Majeed Mohammed Sabeeh, Mahdi Ahmed Baseem, Mutlak Dhameer Ali, Aravindhan Surendar

Journal of Water and Land Development

2022

no. 53

187--191

With the emergence of climate change and the increasing human intervention in the global climate, floods have affected different parts of the world. In practice, floods are the most terrible natural disaster in the world, both in terms of casualties and financial losses. To reduce the adverse effects of this phenomenon, it is necessary to use structural and non-structural methods of flood risk management. One of the structural methods of flood control is to allocate a certain part of reservoir dams to flood control. In order to safely exit the flood from the dam reservoir, the spillway structure should be used. One of the important issues in designing a spillway structure is reducing its construction costs. In order to safely exit the flood with a specified return period from the dam reservoir, as the length of the spillway decreases, the height of the water blade on the spillway increases. In other words, decreasing the spillway length increases the height of the dam and its construction and design costs. In this study, the design and comparison of the performance of two glory spillways and lateral spillways have been considered. The results showed that for a given length for the drain edge of both types of spillways, the height of the water blade on the glory spillway is always higher than the lateral spillway. For example, when a 10,000-year-old flood occurs, it is about 8 m.