内蒙古河套灌区耕地与荒地间水盐补排规律的研究

在野外实测资料的基础上,针对内蒙古河套灌区耕地与荒地间水盐补排关系与水盐运移规律,利用水盐平衡原理,对灌区内耕地间隙分布的荒地进行水分和盐分运移平衡研究。研究显示,耕地盐分部分向荒地迁移,荒地对灌区盐分分布具有调节作用。耕地每年平均有28.1%的灌溉水浸入荒地,荒地每年积盐268.5 g/m2,为灌溉水盐分的38.3%。研究为灌区水盐科学及区域水盐管理提供科学依据,对河套灌区可持续发展具有重要意义。

Transport of Soil Moisture and Salt between Irrigated Land and Saline Land in the Inner Mongolia Hetao Irrigation District

This paper on the basis of surveying the materials in the field,carrying on the research to the farmland and wasteland in Inner Mongolia Hetao irrigation district laterals irrigation water supply and drainage relationship between the salt and water and water-salt migration regularity.The research using water and salt balance principle,carrying out the study for water and salt transport equilibrium of wasteland distributed in the interval of the farmland in irrigation area.The research demonstrated that some of farmland salt are moved to wasteland,the wasteland has the control action to the salinity distribution of irrigation area.The farmland has 28.1% irrigation water which immerse to the wasteland on average every year,the wasteland accumulates salinity 268.5 g/m2 per year,this proportion is about 38.3%in the salinity quantity of irrigation water.The research provides the scientific basis for the water and salt science of irrigation area and the region water and salt management,and it is significant to the sustainable development of the Hetao irrigation area.