摘要
土壤风蚀过程包含风蚀动力过程和风蚀因子及风蚀速率在风蚀过程中的动态变化过程。前者实验和理论研究成果丰富,较清晰地刻画了颗粒起动、搬运和沉降过程;后者重点研究风蚀过程中各类风蚀因子的动态变化规律及其互馈机制,以及土壤风蚀速率对风蚀因子动态变化的响应机制,尚缺乏系统的研究成果。土壤风蚀过程研究的难点在于:(1)风蚀因子的动力学参数化;(2)风蚀因子动态变化过程的观测和定量表达;(3)风蚀过程的尺度问题;(4)模型的预报能力。现阶段土壤风蚀研究迫切需要开展以下工作:建立标准风蚀观测场,获取连续、完整的大田风蚀资料;研究风沙流饱和路径,解决尺度问题;构建具有扎实理论基础、基于动力过程和动态变化过程的风蚀模型。
Soil wind erosion processes include mechanical process and dynamic changes of the factors affecting soil wind erosion, as well as the correspondin$ changes of wind erosion rate. The former is rich in experimental and theoretical researches that have clearly defined the process of particle starting, transporting and settling. The latter focuses on the dynamic changes ofvarious wind erosion factors and the response of soil wind erosion rate to the change of the factors, of which systematic research of which is very limited. The difficulties in research of soil wind erosion process include： ①Dynamic parameterization of wind erosion factors; ②Observation and quantitative expression of the dynamic changes of wind erosion factors; ③Scaling problem of wind erosion process; ④Prediction ability of wind erosion models. At Rresent, it is urgent to carry out the following work on soil wind erosion. The first is to establish standard wind erosion observation field in typical regions to obtain continuous and complete data of wind erosion in the field; the second is to study the saturation path of wind sand flow to solve scale problem; and the third is to construct a wind eroaion model with solid theoretical foundation and fully consider both mechanical process of soil wind erosion and dynamic changes of the factors.
出处
《地球科学进展》
CAS
CSCD
北大核心
2018年第1期27-41,共15页
Advances in Earth Science
基金
国家自然科学基金重点项目“土壤风蚀速率对影响因子动态变化的响应”(编号：41630747)和“土壤风蚀影响因子参数化”(编号：41330746)资助.
关键词
土壤风蚀过程
风蚀因子
过程模型
尺度
Soil wind erosion process
Factors affecting soil wind erosion
Process-based model
Scale.
