本文選題：黃土高原 + 陷穴　； 參考：《土壤通報(bào)》2017年04期

【摘要】：通過對陜北黃土區(qū)六道溝流域切溝內(nèi)陷穴進(jìn)行調(diào)查和統(tǒng)計(jì)分析,探討陷穴的發(fā)育形態(tài)、分布特征及其影響因素。結(jié)果表明:陷穴主要形態(tài)類型有淺碟形、漏斗形、豎井狀以及葫蘆狀,其斷面形態(tài)接近于圓形或橢圓形,陷穴形態(tài)規(guī)模相對偏小,處于成熟期的比例達(dá)72.8%;陷穴長軸、短軸和深度之間均具有顯著的正相關(guān)關(guān)系,其中長軸和短軸之間具有較好的線性關(guān)系;陷穴主要發(fā)育位置為溝道中上游及支溝溝頭處,多與黃土橋和跌水相伴而生;切溝為陷穴的形成和發(fā)育提供了條件,陷穴亦可促進(jìn)切溝進(jìn)一步發(fā)展。上述結(jié)果完善了切溝內(nèi)陷穴的發(fā)生發(fā)育特點(diǎn)和空間分布特征,為深入認(rèn)識陷穴侵蝕機(jī)理,進(jìn)一步研究陷穴侵蝕狀況、陷穴與切溝發(fā)育關(guān)系以及區(qū)域水土流失治理等提供了基礎(chǔ)。
[Abstract]:Based on the investigation and statistical analysis of the caverns in the Liudaogou watershed in the loess region of northern Shaanxi, the developmental morphology, distribution characteristics and influencing factors of the caverns were discussed. The results show that the main morphological types of the cave are shallow dish shape, funnel shape, shaft shape and gourd shape. The shape of the section is close to the circular or elliptical shape, the size of the cave is relatively small, and the proportion in the mature stage is 72.8. There is a significant positive correlation between the short axis and the depth, among which there is a good linear relationship between the long axis and the short axis. The cutting groove provides the condition for the formation and development of the pit, and it can also promote the further development of the notch. The above results improve the characteristics of occurrence and development and spatial distribution of the caverns, and provide a basis for further understanding of the erosion mechanism of the caverns, further study of the erosion status of the caverns, the relationship between the caverns and the gully development, and the control of regional soil erosion and so on.
【作者單位】： 沈陽農(nóng)業(yè)大學(xué)水利學(xué)院;中國科學(xué)院地理科學(xué)與資源研究所;遼寧雙臺河口濕地生態(tài)系統(tǒng)國家定位觀測研究站;
【基金】：國家自然科學(xué)基金項(xiàng)目(41571221) 中國博士后科學(xué)基金項(xiàng)目(2015T80129)資助
【分類號】：S157
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本文編號：1886566