长江科学院院报2017，Vol.34Issue(11)：12-17,6.DOI:10.11988/ckyyb.20160770
采用小波包熵度量入渗水量和试验尺度对土壤水运移非均匀特性的影响
Characterizing the Effects of Infiltration Amount and Experiment Scale on Preferential Water Flow in Soil with Wavelet Packet Entropy
摘要
Abstract
Preferential flow is a common flow pattern of infiltrated rain and irrigated water in unsaturated soils,and characterizing preferential flow is always a hot topic of soil hydrology researches.In this research,the wavelet packet entropy,including the Shannon entropy and logarithmic energy entropy,was used to characterizing the preferential flow heterogeneity under different infiltration conditions.The research results were compared with those characterized by matrix entropy and fractal characteristic parameter to show the feasibility of applying wavelet packet analysis to preferential soil water flow.The results show that:1) the wavelet packet entropy is capable of characterizing the heterogeneity of preferential flow patterns;2) the heterogeneity of preferential flow increases firstly and then decreases as the infiltration amount increases;3) the heterogeneity of preferential flow increases steadily as the experimental scale increases within this research.关键词
土壤优先流/小波包熵/试验尺度/非均匀性/染色示踪Key words
preferential flow in soil/wavelet packet entropy/experiment scale/heterogeneity/dye tracer分类
建筑与水利引用本文复制引用
盛丰,张利勇,吴丹..采用小波包熵度量入渗水量和试验尺度对土壤水运移非均匀特性的影响[J].长江科学院院报,2017,34(11):12-17,6.基金项目
国家自然科学基金项目(51579020) （51579020）
