本文選題：滇東南 + 石漠化�。� 參考：《昆明理工大學(xué)》2014年碩士論文

【摘要】：巖溶石漠化是在脆弱喀斯特地貌基礎(chǔ)上形成的一種荒漠化生態(tài)現(xiàn)象。云南省石漠化較為發(fā)育,16個州(市)均有分布。而滇東南地區(qū)是巖溶石漠化最為嚴(yán)重的地區(qū),部分地區(qū)達(dá)到重度石漠化的等級。 影響滇東南巖溶石漠化的因素比較復(fù)雜,包括人為因素、地質(zhì)因素和自然環(huán)境因素。而最為根本的原因在于滇東南脆弱的地質(zhì)環(huán)境條件。所以本研究通過對前人研究成果的分析與總結(jié),以地質(zhì)學(xué)、巖溶學(xué)、生態(tài)學(xué)相關(guān)理論為指導(dǎo),以詳實的野外地質(zhì)調(diào)查為基礎(chǔ),利用遙感、地理信息、google earth技術(shù)對滇東南地區(qū)進行大范圍調(diào)查和研究,宏觀把握滇東南的石漠化狀況及其地質(zhì)環(huán)境,系統(tǒng)地分析地質(zhì)環(huán)境因素對石漠化發(fā)育的控制及影響作用。詮釋了不同地質(zhì)環(huán)境因素對石漠化發(fā)育及分布的重要性。 通過研究取得以下認(rèn)識及成果： 1、滇東南不同地區(qū)的巖溶石漠化程度不一致。通過計算分析將滇東南巖溶石漠化分為三個單元：石漠化重度單元(Ⅰ),主要包括廣南、硯山、丘北、西疇、文山、蒙自、個舊、開遠(yuǎn)、瀘西、羅平、師宗；石漠化中度單元(Ⅱ),主要包括富寧、麻栗坡、馬關(guān)、建水、彌勒、曲靖、陸良、宜良、澄江、華寧、石林；石漠化程度輕度單元(Ⅲ,含無巖溶石漠化區(qū)域),主要包括：峨山、河口、屏邊、玉溪市、通�？h、石屏、江川。 2、從地貌對巖溶石漠化的影響來看,峰叢洼地和峰林洼地地貌的石漠化概率最大,常常發(fā)育為重度、中度石漠化；巖溶槽谷地貌的石漠化發(fā)生率也較大,但常常是石漠化與非石漠化的山間槽地相間分布。發(fā)生率最低的丘陵,盆地地區(qū),一般以無石漠化、輕度石漠化為主。 3、巖性對巖溶石漠化具有明顯的控制作用。純灰?guī)r地區(qū)石漠化發(fā)生概率比較大,且常發(fā)育為重度石漠化；白云巖與灰?guī)r相間出露地區(qū)石漠化概率較大,常發(fā)育為中度、輕度石漠化；碳酸鹽巖夾碎屑巖的石漠化概率較小,常以中度、輕度石漠化為主；碎屑巖由于可溶性物質(zhì)較少,所以石漠化發(fā)生的概率最小,常發(fā)育為無石漠。 4、從構(gòu)造對石漠化的關(guān)系來看,斷裂對巖溶石漠化的控制影響作用較大,它控制了巖溶石漠化發(fā)育的規(guī)模、類型、展布、趨勢等。節(jié)理裂隙對巖溶石漠化的發(fā)育起著的控制作用,節(jié)理裂隙越發(fā)育,石漠化就越嚴(yán)重。 5、坡度也是巖溶石漠化重要影響因素之一。一般情況下,坡度越大,就越容易發(fā)生石漠化。地面坡度在0°～10°的地區(qū)石漠化發(fā)生的概率比較小,即使發(fā)生石漠化也主要以潛在石漠化和輕度石漠化為主。地面坡度在10°～-20°的地區(qū)石漠化發(fā)生的概率較小,主要發(fā)育輕度石漠化。地面坡度在20°～30°的地區(qū)石漠化發(fā)生的概率稍大,主要以中度石漠化為主,而30°～50°的石漠化發(fā)生概率較大,且主要發(fā)育中度、重度石漠化。50°以上的地區(qū)分布面積雖小且比較分散,但它也比較容易發(fā)生石漠化,且主要以重度石漠化為主。
[Abstract]:Karst rocky desertification is a desertification ecological phenomenon formed on the basis of the fragile Karst landform. The Rocky Desertification in Yunnan province is more developed and 16 states (cities) are distributed, while the Southeast Yunnan is the most serious karst rocky desertification area, and some areas have reached the grade of severe rocky desertification.
The factors affecting karst rocky desertification in southeastern Yunnan are complicated, including human factors, geological factors and natural environmental factors. The most fundamental reason is the fragile geological environment conditions in southeastern Yunnan. Therefore, this study is guided by the theory of geology, karstification and ecology by analyzing and summarizing the achievements of the predecessors. On the basis of field geological survey, remote sensing, geographic information and Google Earth technology are used to carry out a large scale investigation and Study on the Southeast Yunnan region. The situation of rocky desertification and its geological environment in southeastern Yunnan are grasped and the control and effect of geological environment factors on the development of rocky desertification are systematically analyzed. The importance of development and distribution.
The following understanding and achievements have been achieved through the study:
1, karst rocky desertification in different regions of Southeastern Yunnan is different. Through calculation and analysis, the karst rocky desertification in southeastern Yunnan is divided into three units: severe rocky desertification unit (I), mainly including Guangnan, Yanshan, Qiubei, Xichou, Wenshan, Mengzi, old, Kaiyuan, Luxi, Luoping, Shizong, and rocky desertification medium unit (II), mainly including Funing, Malipo, Ma Guan, Jianshui, Maitreya, Qujing, Luliang, Yiliang, Chengjiang, Hua Ning, Shilin; stone desertification degree light unit (III, containing no karst rocky desertification area), mainly include: ehan, estuary, Pingbian, Yuxi City, Tonghai County, shinping, Jiangchuan.
2, according to the effect of geomorphology on karst rocky desertification, the probability of rocky desertification in peak and cluster depression and Fenglin low-lying land is the largest, often developed into severe, moderate rocky desertification, and rock desertification in Karst Valley landforms is also larger, but it is often distributed between rocky desertification and non rocky desertification areas. There is no rocky desertification and mild rocky desertification.
3, lithology has obvious control effect on karst rocky desertification. The probability of rocky desertification in the pure limestone area is relatively large, and it often develops into severe rocky desertification. The probability of rocky desertification in the area of interphase between dolomite and limestone is relatively large, often moderately and lightly rocky, and the probability of rocky desertification in carbonate clipped clastic rocks is small, often moderate and mild stone. Desertification is the main reason for the occurrence of rocky desertification.
4, from the relation of tectonic to rocky desertification, fracture has great influence on the control of karst rocky desertification, which controls the scale, type, distribution and trend of karst rocky desertification. The joint fissure has a control effect on the development of karst rocky desertification, the more the joint fissure is, the more serious the rocky desertification is.
5, the slope is also one of the important factors affecting karst rocky desertification. In general, the larger the slope, the more likely the rocky desertification will occur. The probability of rocky desertification in the area of 0 to 10 degrees is relatively small, even if the rocky desertification occurs mainly with potential rocky desertification and mild rocky desertification, the ground slope in the area of 10 to -20 degrees is rocky desertification. The probability of occurrence is small. The probability of rocky desertification in the area with ground slope from 20 to 30 degrees is slightly larger, mainly with moderate rocky desertification, and the probability of rocky desertification in 30 to 50 degrees is larger, and the main development is moderate. The area over.50 degrees above the severe rocky desertification is small and relatively scattered, but it is also compared. It is easy to occur rocky desertification, and it is mainly severe rocky desertification.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P642.25;X141

【引證文獻(xiàn)】

相關(guān)期刊論文 前2條

1 李冕;郭菁;楊世凡;孫泉忠;;貴州省不同類型石漠化的K值特征初步研究──以石漠化治理工程典型小流域為例[J];中國農(nóng)學(xué)通報;2017年29期

2 陸原;;淺談廣南縣喀斯特地區(qū)石漠化綜合治理[J];生物技術(shù)世界;2016年04期

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本文編號：1976836