摘要
系统地引进SWAP模型,从咸水灌溉对土壤水盐动态、地下水位、地下水质、作物生长及产量的影响等方面,评价了咸水灌溉对环境的影响。试验地点为内蒙古河套灌区红卫田间试验区,引用黄河水和高矿化度地下水混合进行灌溉。微咸水灌溉期间,土壤盐分增加,在适当的黄河水秋浇灌溉淋洗后,土壤盐分降到咸水灌溉前的水平,土壤盐分年度内保持了动态平衡。在微咸水灌溉试验条件下,作物长势及产量基本不受影响,微咸水灌溉不会造成环境恶化。这一结论在SWAP模型模拟结果中也得到了证实,所建立的SWAP模型可以用来对试验区微咸水灌溉作出较为准确的预报,为河套灌区发展微咸水灌溉打下基础。
Through introducing SWAP 2.0 model systematically and considering the effects on dynamic of soil salinity, groundwater table and quality under the condition of lightly saline water irrigation, this paper evaluates the effects on the environment factors introduced by lightly saline water irrigating. Experiment site is located in Hong Wei field experiment district in Hetao Irrigation Districts. Irrigation water is the mix of Yellow River water and the highly saline groundwater. During the lightly saline water irrigating, soil salinity increase. After reasonable autumn irrigation using Yellow River water, the soil salinity can decrease to the level before irrigating, and reach to the dynamic balance in a year. In this experiment, under the condition of lightly saline water irrigation, the crop growing and crop yield is not influenced almost. Saline water irrigation does not lead to environment deterioration and this result is also verified in SWAP Model. So the SWAP model can be used to predict the environmental factors of the experiment district after saline water irrigating in the experimental area. It can be used as the base for developing lightly saline water irrigation in Hetao area.
出处
《水电能源科学》
2005年第2期19-22,共4页
Water Resources and Power
关键词
咸水灌溉
SWAP模型
环境因子
saline water
irrigation
soil water atmosphere plant model
environmental factors
