摘要
以河北平原区望都灌溉试验站为例,选取210m×210m的正方形田块进行试验,在该范围内布置64个测点,分别测量0~30、30~50、50~80cm三个深度的土壤含水率信息。利用经典统计和地统计方法分析了田间土壤含水率的空间变异结构,并采用协同克里格插值技术得到了该区域土壤含水率的空间分布状况。结果表明,0~30cm土层及50~80cm土层的土壤含水率具有中等空间相关性,其相关距离分别为66.4、75.7m,而30~50cm土层表现出了强烈的空间相关性,相关距离为88.2m,研究结果可为实现灌区精准灌溉和土壤墒情预测提供科学的理论指导。
A 210 m× 210 m square field was selected to carry out experiment at representative Wangdu irrigation experimental station in Hebei Plain. Soil moistures of 0-30 cm, 30-50 cm and 50-80 cm were measured separately for the 64 monitoring points. The spatial variability of soil moisture was analyzed using classic and geological statistics method. Spatial distribution of soil moisture was gotten through synergetic Kriging method. The results show that the soil mois- ture of 0-30 cm and 50-80 cm is moderate spatial correlation and the correlation distances are 66.4 m and 75.7 m, respectively. However, the soil moisture of 30-50 cm appears high spatial correlation and its correlation distance is 88.2 m. The findings can provide theoretical direction for precise irrigation and soil moisture prediction.
出处
《水电能源科学》
北大核心
2017年第1期14-16,127,共4页
Water Resources and Power
基金
河北农业大学青年科学基金(QN201319)
