本文選題：崩崗　切入點：節(jié)理　出處：《水土保持研究》2017年03期 　論文類型：期刊論文

【摘要】：崩崗是鄂東南花崗巖地區(qū)普遍存在的土壤侵蝕現(xiàn)象,給農業(yè)生態(tài)與經濟發(fā)展帶來了嚴重影響。研究以鄂東南通城縣楊壟小流域崩崗為研究對象,使用RTK測量數(shù)據,ArcGIS生成DEM圖像,測定坡面坡向及主溝、支溝的發(fā)展方向,運用羅盤測量節(jié)理產狀,描述節(jié)理的區(qū)域性特征,探討了節(jié)理對崩崗發(fā)育的影響。結果表明:楊壟小流域節(jié)理產狀具有方向性和區(qū)域性,多為NE45°—90°和NW280°—310°;崩崗主溝發(fā)展方向主要受坡面坡向的影響,多位于北東向;崩崗支溝的發(fā)育在一定程度上受節(jié)理走向的影響,多分布于NE45°—90°和NW280°—320°;節(jié)理傾角大,節(jié)理面陡可加快崩崗的侵蝕與發(fā)育;節(jié)理可加快地下水的下滲,有利于風化殼的形成,加速崩崗侵蝕。研究結果可為探究崩崗地貌系統(tǒng)侵蝕機理及其治理方法研究提供依據。
[Abstract]:Collapse is a widespread phenomenon of soil erosion in granite area of southeastern Hubei Province, which has brought serious impact to agricultural ecology and economic development. This paper takes Yanglong small watershed of Tongcheng County in southeastern Hubei Province as the research object, and uses RTK data to generate DEM image. The development direction of slope direction, main trench and branch ditch on slope surface is determined. The joint occurrence is measured by compass, and the regional characteristics of joint are described. The results show that the joint occurrence in Yanglong small watershed is directional and regional, most of them are NE45 擄-90 擄and NW280 擄-310 擄, the development direction of main gully is mainly influenced by slope direction, most of them are located in the north east direction. To some extent, the development of the gully is affected by the strike of the joint, which is distributed in NE45 擄-90 擄and NW280 擄-320 擄, the steep joint surface can accelerate the erosion and development of the collapse, and the joint can accelerate the infiltration of groundwater, which is beneficial to the formation of weathering crust. The results can provide a basis for the study of erosion mechanism and treatment methods of landslide geomorphology system.
【作者單位】： 華中農業(yè)大學資源與環(huán)境學院;
【基金】：國家自然科學基金重點項目“花崗巖風化巖土體特性的地帶性分異及崩崗形成機理研究”(41630858);國家自然科學基金“花崗巖紅壤優(yōu)先流及其與崩崗侵蝕發(fā)育的關系”(41571258) 華中農業(yè)大學國家級大學生創(chuàng)新創(chuàng)業(yè)訓練計劃“花崗巖崩崗不同層次土壤可蝕性與抗沖性對龕形成的影響”(201510504021)
【分類號】：S157.1
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本文編號：1611428