Arid Zone Research ›› 2018, Vol. 35 ›› Issue (6): 1299-1307.doi: 10.13866/j.azr.2018.06.06

• Water and Soil Resources • Previous Articles     Next Articles

Simulation of Soil Water and Salt Migration Under Open-ditch Drainage

LI Kai-ming, LIU Hong-guang, SHI Pei-jun, LI Xin-xin   

  1. College of Water Conservancy & Architectural Engineering, Shihezi University/Key Laboratory of Modern Water-saving Irrigation of Xinjiang Corps of Production & Construction, Shihezi University, Shihezi 832000, Xinjiang, China
  • Received:2018-01-15 Revised:2018-06-25 Online:2018-11-15 Published:2025-11-18

Abstract: In this study, the change of saline-alkaline soil salinity in 122nd State Farm of Xinjiang Corps of Production & Construction was monitored by controlling field irrigation. The purposes of the study were to explore the soil water and salt migration under the conditions of drip irrigation, plastic film mulching and open-ditch drainage, develop a HYDRUS numerical model, and simulate and analyze the change of soil salinity in cotton growth period. The results showed that the average desalination rate of 0-80 cm soil layer reached 50.09%, the total salinity of 80-200 cm soil layer was basically maintained, and the salinity of 0-200 cm soil layer was decreased by about 25%. The closer the place from the ditch was, the more efficient the soil desalination would be. The values simulated with the numerical model were in a good accordance with the measured values. The research results could be referred in field management in arid and semiarid saline-alkaline areas.

Key words: drip irrigation under mulch, open-ditch drainage, soil water and salt migration, numerical simulation, Xinjiang Corps of Production and Construction