本文選題：伏沙地 + 遙感解譯��； 參考：《內(nèi)蒙古大學(xué)》2017年碩士論文

【摘要】：本文結(jié)合錫林郭勒草原伏沙地的分布特點(diǎn),在室內(nèi)遙感解譯和野外驗(yàn)證的基礎(chǔ)上劃定伏沙地潛在分布區(qū),在該區(qū)內(nèi)選取27個點(diǎn)位進(jìn)行植物群落調(diào)查和土壤剖面采樣并將分析結(jié)果參與伏沙地生態(tài)環(huán)境脆弱性評價(jià)。根據(jù)SRP概念模型的內(nèi)容,結(jié)合草原伏沙地的特點(diǎn),選取土壤侵蝕強(qiáng)度、歸一化植被指數(shù)、群落退化程度等14個指標(biāo),利用層析分析與空間主成分分析相結(jié)合的方法對各指標(biāo)賦予權(quán)重計(jì)算伏沙地生態(tài)環(huán)境脆弱性指數(shù)。根據(jù)指數(shù)的不同范圍,采用自然斷點(diǎn)法將伏沙地潛在分布區(qū)的生態(tài)環(huán)境劃分為:輕微脆弱、輕度脆弱、中度脆弱、重度脆弱與極度脆弱五類。論文主要研究結(jié)論如下:(1)室內(nèi)遙感解譯,初步確定伏沙地范圍,并在野外核查的過程中驗(yàn)證解譯正確性。在此基礎(chǔ)上劃定伏沙地潛在分布范圍并建立草原伏沙地遙感解譯標(biāo)志。錫林郭勒草原伏沙地主要分布于阿巴嘎旗部分地區(qū)、錫林浩特大部、西烏旗北部和東烏旗中南部地區(qū)。(2)根據(jù)研究區(qū)生態(tài)環(huán)境脆弱性指數(shù)(EEVI)的取值范圍將研究區(qū)劃分為輕微脆弱、輕度脆弱、中度脆弱、重度脆弱和極度脆弱5類,它們占研究區(qū)面積的比例分別為:10.72%、27.56%、32.91%、24.36%和 4.45%。(3)輕微脆弱和輕度脆弱區(qū)主要分布于研究區(qū)東南,該區(qū)水網(wǎng)密集,植被類型為溫性草甸草原,生態(tài)系統(tǒng)穩(wěn)定性和恢復(fù)力較高;極度脆弱區(qū)主要分布于阿巴嘎旗部分地區(qū)和烏拉蓋水庫鹽堿化地區(qū),另外零星分布于大型工礦企業(yè)區(qū),前者由于自身所處地形、氣象和植物群落退化等自然因素導(dǎo)致生態(tài)環(huán)境脆弱程度較高,后者由于人類活動的過度干預(yù)與破壞導(dǎo)致脆弱程度較高。
[Abstract]:Combined with the distribution characteristics of the underlying sandy land in Xilinguole grassland, the potential distribution area of the underlying sandy land is delineated on the basis of indoor remote sensing interpretation and field verification. In this area, 27 sites were selected for plant community investigation and soil profile sampling, and the results were used to evaluate the ecological environment vulnerability of the sandy land. According to the content of SRP conceptual model and the characteristics of grassland sandy land, 14 indexes, such as soil erosion intensity, normalized vegetation index and community degradation degree, were selected. The method of combining chromatography analysis with spatial principal component analysis was used to give weight to each index to calculate the vulnerability index of ecological environment in sandy land. According to the different ranges of the index, the ecological environment of potential distribution areas in sand fields is divided into five categories by using natural breakpoint method: mild fragility, mild vulnerability, moderate vulnerability, severe vulnerability and extreme vulnerability. The main conclusions are as follows: (1) the interpretation of indoor remote sensing is used to preliminarily determine the range of sand fields, and the interpretation is verified by field verification. On the basis of this, the potential distribution area of the underlying sandy land is determined and the remote sensing interpretation mark of the grassland sandy land is established. The underlying sandy land of Xilinguole steppe is mainly distributed in parts of Abagah Banner, most of Xilinhaote, the northern part of Xiwu Banner and the central and southern part of Dongwu Banner. (2) according to the value range of EEVI in the study area, the study area is divided into slightly fragile areas. There are 5 types of mild fragility, moderate vulnerability, severe vulnerability and extreme vulnerability. The proportion of them to the area of the study area is: 10.722 27.56, 32.91% and 4.45% respectively. (3) the slightly vulnerable and mildly fragile areas are mainly distributed in the southeast of the study area, where the water network is dense. The vegetation type is temperate meadow steppe with high ecosystem stability and resilience. The extremely fragile areas are mainly distributed in parts of Abagah Banner and the salinization area of Wulagei reservoir, and scattered in large industrial and mining enterprise areas. The former has a high degree of vulnerability due to its own topography, natural factors such as meteorology and plant community degradation, while the latter is more vulnerable because of excessive intervention and destruction of human activities.
【學(xué)位授予單位】：內(nèi)蒙古大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：Q948

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