Multi-target planting structure adjustment under different hydrologic years using AquaCrop model
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ORIGINAL PAPER
Multi-target planting structure adjustment under different hydrologic years using AquaCrop model Fawen Li 1 & Manjin Zhang 1 & Yong Zhao 2 & Rengui Jiang 3 Received: 8 February 2020 / Accepted: 13 September 2020 # Springer-Verlag GmbH Austria, part of Springer Nature 2020
Abstract Increasing demand for water due to global population and economic growth will lead to severe global water shortage. Agricultural water consumes a large portion of water, and adjusting agricultural planting structure is one of the important means to realize agricultural water-saving. This paper took 2030 as the planning year and Shijin Irrigation District as the research area. Using the AquaCrop model, combined with field management, climatic and other conditions affecting crop growth and the yields of winter wheat, summer maize, and cotton under irrigation and rain-fed conditions were simulated in the planning year (2030). Taking the minimum consumption of agricultural irrigation water and the highest economic income as the goal, the planting structure adjustment plans of different hydrologic years are optimized under the limitation of water availability, cultivated land, and food security. The results showed that, after the adjustment of planting structure, the economy created by agriculture in the dry, normal, and wet year will increase by 0.1 billion yuan, 0.7 billion yuan, and 2.6 billion yuan, and the amount of irrigation is decreased by 42 million m3, 448 million m3, and 526 million m3, respectively.
1 Introduction The amount of freshwater on land accounts for 2.53% of the Earth’s total water, of which only 0.3% can be easily utilized by humans, accounting for merely 1/100,000 of the world’s total water. Increasing demand for water due to global population and economic growth, especially in developing countries with low water use efficiency and extensive agricultural acreage, will lead to severe global water shortage (Hoffman 2008; Falkenmark 2013). China is a developing country with the largest population in the world, with per capita water
* Fawen Li [email protected] * Yong Zhao [email protected] 1
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, People’s Republic of China
2
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resource and Hydro-power Research, Beijing 100038, People’s Republic of China
3
State Key Laboratory of Eco-hydrologic Engineering in Northwest in the Arid Area, Xi’an University of Technology, Xi’an 710048, Shaanxi, China
consumption of only 2200 m3, equivalent to 1/4 of the world’s per capita level, which is one of the 13 countries with the poorest per capita water consumption in the world. Agricultural water accounts for about 70% of China’s total water consumption. In particular, the Beijing-Tianjin-Hebei region hosts 8% of the country’s population, but water resources account for less than 1% of the total (Du and Yu 2018). It is vital to study agricultural water-saving
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