本文選題：GIS + 土壤侵蝕　； 參考：《水利水電技術(shù)》2017年09期

【摘要】：以GIS為支撐,選取三峽庫(kù)區(qū)湖北段為研究區(qū),采用修正通用土壤流失方程與抗蝕年限法相結(jié)合的方法,計(jì)算和分級(jí)評(píng)價(jià)了研究區(qū)土壤侵蝕潛在危險(xiǎn)度,并根據(jù)生成的土壤侵蝕潛在危險(xiǎn)度分布圖,探討不同高程、坡度、土壤等侵蝕背景條件下的土壤侵蝕潛在危險(xiǎn)度空間分布特點(diǎn)。結(jié)果顯示,研究區(qū)土壤侵蝕潛在危險(xiǎn)度以無(wú)險(xiǎn)型和輕險(xiǎn)型為主,占總面積的96.27%,主要分布在巴東南部、興山北部和夷陵區(qū)東南部;危險(xiǎn)型面積相對(duì)較小,主要分布于山丘中上部;極險(xiǎn)型和毀壞型面積很小,零星分布在生態(tài)環(huán)境脆弱、土層薄、植被覆蓋率低的荒嶺坡地上。綜合不同侵蝕背景分析表明,200~500 m高程帶危險(xiǎn)度最大,35°坡度帶侵蝕程度最嚴(yán)重,石灰土和紫色土地區(qū)土壤侵蝕危險(xiǎn)度指數(shù)SEPDI值最高。
[Abstract]:With GIS as the support and Hubei section of the three Gorges Reservoir area as the study area, the potential risk degree of soil erosion in the study area was calculated and graded by combining the modified general soil erosion equation with the corrosion resistance years method. According to the distribution map of soil erosion potential risk, the spatial distribution characteristics of soil erosion potential hazard under different soil erosion background conditions such as elevation, slope and soil were discussed. The results showed that the potential risk of soil erosion in the study area was mainly non-risk type and light risk type, accounting for 96.27% of the total area, mainly distributed in southeast of Pakistan, north of Xingshan and southeast of Yiling area, and the risk type area was relatively small, mainly distributed in the middle and upper part of the hill. The extremely dangerous type and the destruction type area are very small, scattered distributes in the ecological environment fragile, the soil layer is thin, the vegetation coverage is low on the wasteland slope land. The analysis of different erosion background shows that the maximum risk degree of the 500 m elevation zone is the most serious, and the soil erosion risk index (SEPDI) of lime soil and purple soil is the highest.
【作者單位】： 長(zhǎng)江科學(xué)院水土保持研究所;中國(guó)水利水電科學(xué)研究院泥沙研究所;黃河水利委員會(huì)綏德水土保持科學(xué)試驗(yàn)站;
【基金】：國(guó)家自然科學(xué)基金青年基金(51209014) 中國(guó)科學(xué)院科技服務(wù)網(wǎng)絡(luò)計(jì)劃(STS計(jì)劃)項(xiàng)目(KFJ-EW-STS-087)
【分類號(hào)】：S157.1

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本文編號(hào)：2006341