摘要
土壤风蚀可蚀性是土壤的内在属性,表征着土壤对风蚀发生发展的敏感程度,是土壤风蚀研究的重要基础性内容。现阶段,虽然土壤风蚀可蚀性研究已取得较大进展和丰硕成果,但仍有许多重要问题尚未解决。为继续推动和发展土壤风蚀可蚀性研究工作,在系统分析国内外研究进展的基础上,笔者围绕土壤风蚀可蚀性概念内涵、量化表达和动态特征3个焦点和热点问题进行了综合评述:1)目前一般将土壤对风蚀的敏感性定义为土壤风蚀可蚀性,但土壤风蚀是连续的动力学和物理学过程,因此相关研究应对其力学属性的深入探讨;2)现有的WEQ、WEPS、WEELS、RWEQ等土壤风蚀预报模型及其评价指标错综复杂,各具理论局限性。因此,研究探索一种科学、简便、普适的土壤风蚀可蚀性量化表达方法是目前该领域急需解决的重要研究内容;3)土壤风蚀可蚀性是一种随环境条件变化而改变的动态特征,未来研究应把该特征纳入土壤风蚀可蚀性预报模型中,从而提升土壤风蚀可蚀性和土壤风蚀的计算精度。此综述明确了现阶段土壤风蚀可蚀性研究的局限性,提出了未来研究的发展方向,可为相关学者提供参考和借鉴。
[Background]Wind erodibility,which symbolizes the resistance of soil to the erosion by wind,is an important foundation for a variety of erosion models.It is well acknowledged that studies on it could effectively help deepen the understanding about erosion prevention and desertification combating.Globally plenty of empirical models have been put forward to evaluate soil wind erodibility,which have doubtlessly provided great conveniences.However,there are still some critical issues remaining unclear with respect to its mechanical properties,quantitative evaluation,dynamic characteristics,etc.In order to systematically discuss the limitations above,here we summarized relevant results and conclusions to knit the framework,aiming at promoting the developments in exploring the mechanisms of wind erodibility.[Methods]All selected references were from CNKI,ScienceDirect,Springer and other domestic and international databases with the keywords of“wind erosion”and“wind erodibility”.Based on the high-frequency vocabulary of references,combined with the focus of current research,this paper mainly reviewed the research progress of wind erodibility from three aspects:Concept and connotation,quantitative evaluation,and dynamic characteristics.[Results]1)Essence and connotation of wind erodibility.Wind erodibility now is generally defined as the sensitivity of soil to wind erosion,which is insufficiently precise to describe its essence.And from the perspective of erosion dynamics,mechanics property of wind erodibility is of great importance.Thus,it is highly recommended that mechanics property should be considered to accurately depict the resistant capacity of soil to wind erosion,so that providing the guide for its quantitative evaluation further.2)Key indices and quantitative assessment.Wind erodibility is dominated by soil intrinsic features.Thus,many different soil indices including soil organic matter(SOM),calcium carbonate(CaCO3),particle size distribution(PSD),etc are proposed to evaluate wind erodibility quantitatively.However,the assembly of these indices tend to be intricate,in which each one of them could only represent a partial appraisal system,but not an integrated one.Therefore,it is an urgent and imperative task to figure out how to distinguish and combine the function of different soil indices,to establish a comprehensive equation in assessing wind erodibility,which could be more reasonable,convenient,and ubiquitous.3)Modeling in consideration of dynamic characteristics.Wind erodibility could vary followed the change of climate and anthropogenic activities.However,the influencing factors,driving mechanism and key processes of wind erodibility are still unclear,and the dynamic characteristics of wind erodibility are not included in the basic framework of the model.Therefore,the quantitative model of wind erodibility should be modified to improve the calculation accuracy of wind erodibility and wind erosion.[Conclusions]This improved information will be essential to make a better understanding on technical know-how of the limitations and disadvantages in wind erodibility,providing new references for relative researchers and guiding consecutive developments and progresses.
作者
高广磊
殷小琳
丁国栋
赵媛媛
孙桂丽
王陇
GAO Guanglei;YIN Xiaolin;DING Guodong;ZHAO Yuanyuan;SUN Guili;WANG Long(School of Soil and Water Conservation, Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation, Beijing Forestry University, 100083, Beijing, China;Yanchi Ecology Research Station of the Mu Us Desert, 751500, Yanchi, Ningxia, China;China Institute of Water Resource and Hydropower Research, 100038, Beijing, China;College of Forestry and Horticulture, Xinjiang Agricultureal University, 830052, Urumqi, China)
出处
《中国水土保持科学》
CSCD
北大核心
2022年第1期143-150,共8页
Science of Soil and Water Conservation
基金
中央高校基本科研业务费专项资金“天山北坡经济带荒漠化防治研究”(2019GJZL11)
国家自然科学基金“风沙土可蚀性特征及其量化模型研究”(31600583)
国家重点研发计划项目“基于低覆盖度理论的防沙治新材料、新装备、新技术研发”(2018YFC0507101)。
关键词
土壤风蚀
概念内涵
量化表达
动态特征
wind erosion
concept and connotation
quantitative evaluation
dynamic characteristic
