本文選題：崩崗　切入點：時空分布規(guī)律　出處：《江西農(nóng)業(yè)大學》2017年碩士論文　論文類型：學位論文

【摘要】：南方紅壤區(qū)的崩崗侵蝕以廣東省地區(qū)最為劇烈,而五華縣的侵蝕程度又位列該區(qū)域首位,是崩崗分布的標志性地區(qū)。本文以五華縣油田鎮(zhèn)作為研究區(qū),收集1978年、1995年的地形圖以及2005年崩崗普查資料,采用ArcGIS、RDA分析與人工處理相結(jié)合的方法分析崩崗的時空分布規(guī)律,并揭示崩崗分布的原因。研究結(jié)果如下:(1)1978~2005年時段油田鎮(zhèn)崩崗表現(xiàn)為先減少再急劇增加趨勢,總體呈現(xiàn)增加的態(tài)勢,其中個數(shù)、面積、體積分別增加了380%、632%、494%,侵蝕模數(shù)為30489.4t/(km2?a),相當于每年侵蝕地面22.6 mm,屬于劇烈侵蝕范圍。從崩崗規(guī)�？�,崩崗由中、大型崩崗為主向大型崩崗集中的方向發(fā)展。(2)崩崗侵蝕的空間分布規(guī)律:油田鎮(zhèn)崩崗主要集中在西南區(qū)域的萬華村、洋坑村、下陶村,呈現(xiàn)西南向東北遞減的分布特點。崩崗主要出現(xiàn)在海拔高度100~300m,相對高度在0~60 m,坡度在15°~35°的陡坡及急陡坡,坡向為陽坡的丘陵地帶,并且存在海拔高度、相對高度、坡度的分布表現(xiàn)為先增多再急劇減少的趨勢,陽坡與陰坡崩崗之比約為3:1的特征。(3)崩崗侵蝕隨時間變化規(guī)律:1978~2005年,從不同年代崩崗整體分布看,其分布特征有小范圍的差異,但總體分布情況保持一致;從單項指標變化看,崩崗行政區(qū)域分布、高程分布、坡度分布、坡向分布變化結(jié)果雖然復(fù)雜多樣且無明顯規(guī)律,但不同類型分布的變化基本與該時段的侵蝕現(xiàn)狀變化情況一致,均有在前期(1978~1995)變化較平緩,在后期(1995~2005)急劇變化的規(guī)律。(4)相對高度對單個崩崗發(fā)揮主要的作用,最高海拔、加權(quán)坡度等因子對崩崗分布也有重要影響。坡向、最低海拔等其他因子對崩崗的影響較小。(5)坡度、坡向、高程等地貌因素對區(qū)域崩崗的分布發(fā)揮主要作用,經(jīng)濟、社會因素、植被因素對其表現(xiàn)為輔助作用。
[Abstract]:The collapse erosion in southern red soil region is the most severe in Guangdong Province, and Wuhua County is the first one in this region, which is the landmark area of collapse distribution. This paper takes Yutian Town, Wuhua County, as the research area. The topographic map of 1978 and 1995 and the general survey data of collapsing hill on 2005 were collected. The temporal and spatial distribution of the collapse was analyzed by combining ArcGISRDA analysis with manual processing. The results of the study are as follows: in the period of 1978-#date0#, in Yutian Township, the tendency of collapse was first reduced and then increased sharply, and the number, area and volume of the collapse were increased by 380, 632 and 494, respectively, and the erosion modulus was 30489.4 t / r / km2? A, equivalent to the annual erosion of the ground 22.6 mm, belong to the scope of severe erosion. The spatial distribution of collapse erosion in Yutian Town is mainly concentrated in Wanhua Village, Yangkeng Village and Xiatao Village in southwest China. The slope collapse occurred mainly at the elevation of 100 ~ 300 m, the relative height of 0 ~ 60 m, the gradient of 15 擄~ 35 擄and the steep slope. The slope was a hill with a sunny slope, and there were elevation and relative height. The slope distribution shows the tendency of increasing first and then decreasing sharply. The ratio of sunny slope to shady slope is about 3: 1. The slope erosion changes with time. From 1978 to 2005, the distribution characteristics of slope collapse are different in a small range from the whole distribution of collapse in different years. But the overall distribution remained the same. From the point of view of the single index change, the distribution of administrative area, elevation distribution, slope distribution, slope direction distribution, although the result is complex and diverse and has no obvious rule, However, the variation of distribution of different types is basically consistent with the current situation of erosion in this period, and the change is relatively gentle in the early stage of 1978-1995), and the law of sharp change in the late stage of 1995 / 2005. (4) the relative height plays a major role in the single collapse, the highest elevation. Other factors, such as slope direction, minimum elevation and other factors, have a small influence on the slope, slope direction, elevation and other geomorphological factors, which play a major role in the distribution of regional collapse, economic and social factors. Vegetation factors play an auxiliary role to it.
【學位授予單位】：江西農(nóng)業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P642.2;P931

【參考文獻】

相關(guān)期刊論文 前10條

1 馮凌;張紅;劉光磊;申小雨;;汾河源頭地區(qū)土壤侵蝕時空變化及其空間自相關(guān)分析[J];水土保持通報;2016年01期

2 宋月君;;江西省贛縣崩崗發(fā)育的地貌特征分析[J];亞熱帶水土保持;2015年03期

3 張大林;劉希林;;崩崗堆積土體滲透特性及剖面水分特征——以廣東省五華縣蓮塘崗崩崗為例[J];水土保持通報;2015年02期

4 劉洪鵠;秦飛;陳錦;劉政輝;丁文峰;;人工調(diào)查崩崗數(shù)據(jù)精度分析[J];長江科學院院報;2015年03期

5 劉希林;張大林;;基于三維激光掃描的崩崗侵蝕的時空分析[J];農(nóng)業(yè)工程學報;2015年04期

6 劉希林;張大林;;崩崗地貌侵蝕過程三維立體監(jiān)測研究——以廣東五華縣蓮塘崗崩崗為例[J];水土保持學報;2015年01期

7 林敬蘭;黃炎和;林金石;蔣芳市;;福建省崩崗侵蝕的地質(zhì)地貌背景分析[J];亞熱帶水土保持;2014年04期

8 李萬能;金平偉;李嵐斌;李紅;丘彩娟;冼茂毅;覃金清;;南方紅壤丘陵區(qū)崩崗成因機理的研究進展[J];亞熱帶水土保持;2014年03期

9 高天雷;武萍;尹學明;;土壤侵蝕模型研究進展[J];四川林業(yè)科技;2014年04期

10 方蕓蕓;陳志強;陳志彪;;根溪小流域崩崗分布特征研究[J];吉林師范大學學報(自然科學版);2014年03期

相關(guān)博士學位論文 前1條

1 牛德奎;華南紅壤丘陵區(qū)崩崗發(fā)育的環(huán)境背景與侵蝕機理研究[D];南京林業(yè)大學;2009年

相關(guān)碩士學位論文 前8條

1 杜，

本文編號：1579920