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Yangzhou University (扬州大学) 2021

Monitoring Analysis and Numerical Simulation of Soil Water-Salt Dynamics under Irrigation Conditions in Arid Area of Northwest China

袁成福

Titre : Monitoring Analysis and Numerical Simulation of Soil Water-Salt Dynamics under Irrigation Conditions in Arid Area of Northwest China

Auteur : 袁成福

Grade : Doctoral Dissertation 2021

Université : Yangzhou University (扬州大学)

Résumé partiel
There was a serious shortage of water resources in arid and semi-arid areas of Northwest China(hereinafter referred to as the arid area of Northwest China,the same below).The surface water and groundwater was excessively used in agricultural production.The shortage of water resources and soil salinization had seriously restricted the sustainable development of agricultural production and the improvement of ecological environment in arid area of Northwest China.As the background of the shortage of water resources and implementation status of water-saving irrigation technology in arid area of Northwest China,the Hetao Irrigation District of Inner Mongolia and Shiyang River Basin of Gansu province were chosen as typical study area.Dynamics law of groundwater,soil water-salt and main influencing factors were analyzed in cultivated land and saline wasteland(hereinafter referred to as cultivated-wasteland,the same below)based on the observation of soil water-salt and data colllection.Groundwater flow movement was simulated using MODFLOW numerical model in cultivated-wasteland.It estimated the groundwater salt movement amount between cultivated land and saline wasteland and analyzed the salt balance of cultivated-wasteland in the study area.The Soil-Water-Atmosphere-Plant(SWAP)model simulated soil water-salt dynamics and water-salt balance under saline water irrigation and Yellow River water irrigation based on data collection and field experiments in the typical study area.Crop irrigation schedule was simulated and optimized using SWAP model.The aim was to provide theoretical basis for the efficient utilization of water resources,agriculture sustainable development and the prevention and control of soil salinization in arid area of Northwest China

Mots clés : Arid area of Northwest China ;Saline water irrigation ;Cultivated land and saline wasteland ;Groundwater and soil water-salt ;Numerical simulation ;

Présentation (CNKI)

Page publiée le 17 février 2022