摘要
在冬春灌溉期间 ,由于灌溉水源、灌溉方式、灌溉时间不同 ,当水流入农田时 ,将具有不同的水温。灌溉水温不同 ,在相同的灌溉水量条件下 ,其热容量不同 ,导致土壤温度分布不同 ,必将影响到冻土的入渗规律。该文通过土壤冻结期间积水入渗试验 ,获得了不同入渗水温条件下冻土的入渗规律。试验结果表明 ,入渗水温对冻土入渗规律的影响十分明显 ,冻土的入渗能力随入渗水温的升高而增强。
During winter and spring irrigation, because of the variations in irrigation water source, irrigation manner and irrigation time, the irrigation water will be at different temperatures as it flowed into the farm land. Under the same irrigation rate, the water will have different heat capacity, which results in different soil temperature distribution, and affects the infiltration characteristics of frozen soil. During the freezing period, the infiltration experiments were conducted and the infiltration characteristics of the frozen soil under different water temperatures were obtained. The results show that the infiltration water temperature has strong influence on infiltration into frozen soil, the infiltration capacity enhanced with the water temperature increasing. It would provide basis for determining reasonable irrigation parameters within the winter and spring irrigation in seasonal frozen areas.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2002年第2期41-44,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金资助项目 (5 98790 14 )
关键词
入渗水温
季节性冻土
累积入渗量
地温
infiltration water temperature
seasonal frozen soil
cumulative infiltration capacity
soil temperature
