Next Article in Journal
Mesocosm Experiments Reveal Global Warming Accelerates Macrophytes Litter Decomposition and Alters Decomposition-Related Bacteria Community Structure
Previous Article in Journal
Prediction of the Cavitation over a Twisted Hydrofoil Considering the Nuclei Fraction Sensitivity at 4000 m Altitude Level
Article

Simulation of Water and Salt Dynamics under Different Water-Saving Degrees Using the SAHYSMOD Model

by 1,2,3, 1,2,3,*, 1,2,3, 1,2,3 and 1,2,3
1
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
2
Department of Irrigation and Drainage, China Institute of Water Resources and Hydropower Research, Beijing 100048, China
3
National Center of Efficient Irrigation Engineering and Technology Research, Beijing 100048, China
*
Author to whom correspondence should be addressed.
Academic Editor: Pilar Montesinos
Water 2021, 13(14), 1939; https://doi.org/10.3390/w13141939
Received: 19 May 2021 / Revised: 3 July 2021 / Accepted: 6 July 2021 / Published: 13 July 2021
Water shortage and soil salinization are the main issues threatening the sustainable development of agriculture and ecology in the Hetao Irrigation District (HID). The application of water-saving practices is required for sustainable agricultural development. However, further study is required to assess the effects of these practices on water and salt dynamics in the long term. In this study, the impacts of different water-saving practices on water and salt dynamics were investigated in the HID, Northwest China. The SAHYSMOD (integrated spatial agro-hydro-salinity model) was used to analyze the water and salt dynamics for different water-saving irrigation scenarios. The results indicate that the SAHYSMOD model shows a good performance after successful calibration (2007–2012) and validation (2013–2016). The soil salinity of cultivated land in the middle and upper reaches of the irrigation district decreased slightly, while that in the lower reaches increased significantly over the next 10 years under current irrigation and drainage conditions. It is predicted that if the amount of water diverted is reduced by up to 15%, the maximum water-saving volume could reach 650 million m3 yr1. For the fixed reduction rate of total water diversion, the prioritized measure should be given to reduce the amount of field irrigation quota, and then to improve the water efficiency of the canal system. Although a certain amount of water can be saved through various measures, the effect of water saving in the irrigation district should be analyzed comprehensively, and the optimal water management scheme should be determined by considering the ecological water requirement in the HID. View Full-Text
Keywords: SAHYSMOD; water and salt dynamics; spatial change; water-saving irrigation; ecological water requirement SAHYSMOD; water and salt dynamics; spatial change; water-saving irrigation; ecological water requirement
Show Figures

Figure 1

MDPI and ACS Style

Chang, X.; Wang, S.; Gao, Z.; Chen, H.; Guan, X. Simulation of Water and Salt Dynamics under Different Water-Saving Degrees Using the SAHYSMOD Model. Water 2021, 13, 1939. https://doi.org/10.3390/w13141939

AMA Style

Chang X, Wang S, Gao Z, Chen H, Guan X. Simulation of Water and Salt Dynamics under Different Water-Saving Degrees Using the SAHYSMOD Model. Water. 2021; 13(14):1939. https://doi.org/10.3390/w13141939

Chicago/Turabian Style

Chang, Xiaomin, Shaoli Wang, Zhanyi Gao, Haorui Chen, and Xiaoyan Guan. 2021. "Simulation of Water and Salt Dynamics under Different Water-Saving Degrees Using the SAHYSMOD Model" Water 13, no. 14: 1939. https://doi.org/10.3390/w13141939

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop