The Study On Water-salt Dynamic Movement In The Step Of Carry Water Irrigation District

Improve the existing land production capacity of irrigated area, improve it with the land of salinization of soil of development and utilization and salinization of soil of secondary of preventing and curing the soil, have already become and realized the sustainable utilization of land resource and an important respect of agricultural sustainable development. This text is on the basis of analyse and summarize and transport and move the research results of the law about the soil water salt both at home and abroading, use domain knowledge , such as soil water salt sport , farmland draining off water, water resource , water quality environment, system engineering , computer technology ,etc. synthetically, mention the characteristic of water and irrigated area soil to the step, utilize theory analysis and simulation test method, carry water irrigated area water salt and transport and move the basic law and main influence factor and carry on research to the step , is it is it pour water according to data that test get terms one-dimensional step propose water irrigated area water salt is it move simple mathematics model of course to transport to happen to inquire into. Propose water irrigated area soil water salt and transport the mechanism of moving and return to water to irrigate potentiality after probing into the step, have improved, prevented and cured the research, such as salinization of soil of the soil secondary and irrigated area water environmental protection,etc. and established very good foundation for the salt and alkaline land of irrigated area , theory and practice meaning with importance.This text salt and alkaline land investigate live, long-term groundwater monitoring system observe one-dimensional water accumulation is it ooze soil ink salt transport and move testing to enter with room through scene electric irrigated area, analyse one-dimensional soil moisture sport law , soil salt divide into Butt solicit, soil first try between water content and influence that salt distribute, set up one-dimensional water accumulation is it infiltrate salt transport mathematics model and numerical simulation that move to enter, develop water is it ooze terms soil moisture and salt transport course , law and mechanism moved ,etc. issue carry on research to enter irrigating.The full text divides into six chapters altogether. Chapter one proceed from reality , analyse the research background and meaning of the thesis, moving and salt and alkaline land research dynamic status and trend that the domestic and international soil water salt of survey is transported, have pointed out the goal in research of this text and main content; Chapter two introduced the basic situation of the electric irrigated area of scene , and has analysed the reason why the salt and alkaline land forms; Chapter three carry on a large number of on-the-spot investigations to the salt and alkaline land of irrigated area , analyse the salt and alkaline land and water sample and soil kind, study its origin cause of formation; Chapter four transport the change that moves and carry on concrete analysis to the soil water salt of irrigated area on the basis of preceding paragraphs; Chapter five the one-dimensional water accumulation enters oozing the soil water salt to transport and move testing in monitoring test and room live in the salt and alkaline land trial zone of irrigated area, set up one-dimensional water accumulation is it infiltrate salt mathematics model and numerical simulation moved to transport develop water is it ooze terms soil moisture and salt transport the course moved to enter irrigating to enter, the questions , such as law and mechanism ,etc. carry on research; According to several the first research conclusions of chapter, the measure that chapter six has put forward the irrigated area and prevented and cured the salinization of soil of the soil secondary and environmental protective measure of water; Summarized work of the full text finally, and pointed out the question remained to further investigate further.This thesis scene electric irrigated area water salt through study is it move attitude law to transport, is it influence irrigated area water salt two major factor moved to transport to is it accumulate salt factor and drain off water the desalination factor to pilot a ship into harbour to find. Through building the model of setting up and testing in the room, put forward water salt and transport and move the groundwater critical depth that influences crops to grow and ideal interval of draining off water. The above-mentioned results of study will help to carry water irrigated area soil water salt and transport the deep understanding which move the mechanism to the step , is it inquire into simulation soil water salt is it move course simple and suitable mathematics model to transport to contribute to, and there is certain directive significance in the prevention and cure to the soil salinization of irrigated area and protection of water environment.