本文選題：紅壤土　切入點(diǎn)：人工降雨　出處：《湖南大學(xué)》2015年碩士論文

【摘要】：南方丘陵地帶地勢多變,導(dǎo)致這一帶地區(qū)水土流失較為嚴(yán)重。而長沙城處于從丘陵向平原的過渡地帶,且以紅壤土為主。又因紅壤粘重,保水保肥力差,耕性較差,有酸、粘、瘦的特性,也使長沙地區(qū)土壤水分保持工作接受嚴(yán)峻的挑戰(zhàn)。水土流失危害不僅對土地資源造成破壞,同樣使農(nóng)業(yè)生產(chǎn)環(huán)境變得更為惡化,生態(tài)平衡受到破壞,水災(zāi)旱災(zāi)也日漸頻繁,并且各業(yè)生產(chǎn)的發(fā)展都受到一定的影響。本文立足于長沙地區(qū)土壤特性,研究各因素對于土壤入滲性能的影響,這對于減少地表的徑流量、增加土壤入滲、防止土壤受到侵蝕和搞好生態(tài)環(huán)境的建設(shè)等方面具有比較重要的意義。試驗(yàn)采用人工降雨裝置來模擬降雨過程。研究按正交試驗(yàn)方案進(jìn)行,關(guān)于單因素對土壤入滲率的影響,制定五因素四水平的正交試驗(yàn)方案;對于雙因素的交互作用的影響,則制定了五因素兩水平的正交試驗(yàn)方案。結(jié)果表明:1.在土壤初期含水率、地面坡度、降雨強(qiáng)度、降雨歷時和綠地率這五個因素中,降雨強(qiáng)度對土壤入滲率的影響是最顯著的,其次影響性排序?yàn)榫G地率、坡度、土壤含水率和降雨歷時。2.對于雙因素的交互作用,通過方差分析的F檢驗(yàn)法,得出土壤初期含水率與降雨強(qiáng)度的交互作用、坡度與降雨強(qiáng)度的交互作用、降雨歷時與綠地率的交互作用、坡度與降雨歷時的交互作用、降雨強(qiáng)度與綠地率的交互作用和降雨強(qiáng)度與降雨歷時的交互作用這六種交互作用對土壤入滲率的影響是高度顯著。
[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.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S152.72

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本文編號：1717755