长沙地区红壤入渗率影响因素的试验研究

发布时间：2018-04-06 03:23

本文选题：红壤土　切入点：人工降雨　出处：《湖南大学》2015年硕士论文

【摘要】：南方丘陵地带地势多变,导致这一带地区水土流失较为严重。而长沙城处于从丘陵向平原的过渡地带,且以红壤土为主。又因红壤粘重,保水保肥力差,耕性较差,有酸、粘、瘦的特性,也使长沙地区土壤水分保持工作接受严峻的挑战。水土流失危害不仅对土地资源造成破坏,同样使农业生产环境变得更为恶化,生态平衡受到破坏,水灾旱灾也日渐频繁,并且各业生产的发展都受到一定的影响。本文立足于长沙地区土壤特性,研究各因素对于土壤入渗性能的影响,这对于减少地表的径流量、增加土壤入渗、防止土壤受到侵蚀和搞好生态环境的建设等方面具有比较重要的意义。试验采用人工降雨装置来模拟降雨过程。研究按正交试验方案进行,关于单因素对土壤入渗率的影响,制定五因素四水平的正交试验方案;对于双因素的交互作用的影响,则制定了五因素两水平的正交试验方案。结果表明:1.在土壤初期含水率、地面坡度、降雨强度、降雨历时和绿地率这五个因素中,降雨强度对土壤入渗率的影响是最显著的,其次影响性排序为绿地率、坡度、土壤含水率和降雨历时。2.对于双因素的交互作用,通过方差分析的F检验法,得出土壤初期含水率与降雨强度的交互作用、坡度与降雨强度的交互作用、降雨历时与绿地率的交互作用、坡度与降雨历时的交互作用、降雨强度与绿地率的交互作用和降雨强度与降雨历时的交互作用这六种交互作用对土壤入渗率的影响是高度显著。
[Abstract]:Southern hilly terrain is changeable, resulting in this area more serious soil erosion.Changsha is in the transition zone from hilly to plain, and red loam is the main one.Because of the red soil viscosity, poor water conservation and fertility, poor tillage, acid, sticky, thin characteristics, also make the Changsha area soil moisture conservation work to accept severe challenges.Soil and water loss harm not only damages the land resources, but also makes the agricultural production environment worse, the ecological balance is destroyed, the flood and drought are also frequent day by day, and the development of production in various industries is affected to a certain extent.Based on the soil characteristics of Changsha area, this paper studies the influence of various factors on soil infiltration performance, which can reduce surface runoff and increase soil infiltration.It is of great significance to prevent soil erosion and improve the construction of ecological environment.Artificial rainfall device was used to simulate the rainfall process.The study was carried out according to the orthogonal test scheme. The orthogonal test scheme with five factors and four levels was established for the effect of single factor on soil infiltration rate, and the orthogonal experiment scheme for the interaction of two factors was developed.The result shows that 1: 1.Among the five factors, soil moisture content, surface slope, rainfall intensity, rainfall duration and greenbelt rate, the effect of rainfall intensity on soil infiltration rate is the most significant, followed by greenbelt rate and slope degree.Soil moisture content and rainfall duration.For the interaction of two factors, the interaction between soil moisture content and rainfall intensity, the interaction between slope and rainfall intensity, and the interaction between rainfall duration and green space rate were obtained by F test method of ANOVA.The interaction between slope and rainfall duration, the interaction between rainfall intensity and green space rate, and the interaction between rainfall intensity and rainfall duration were highly significant.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S152.72

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