【摘要】：國內(nèi)外對(duì)林下水土流失區(qū)域判別技術(shù)的研究很少,利用計(jì)算機(jī)進(jìn)行林下水土流失的自動(dòng)識(shí)別更是一個(gè)尚待解決的難題。該文利用遙感技術(shù),選取典型的土壤侵蝕區(qū)福建省長汀縣河田盆地為研究區(qū),綜合考慮植被覆蓋度、植被健康度和坡度3個(gè)因素,建立林下水土流失判別模型,提取了河田盆地林下水土流失區(qū),實(shí)現(xiàn)了林下水土流失面積的定量估算和動(dòng)態(tài)監(jiān)測。結(jié)果表明,河田盆地林下水土流失區(qū)主要分布于緩坡地帶;2011—2014年間,林下水土流失總面積占林地總面積比例由22.13%減少至21.94%,同比下降0.19個(gè)百分點(diǎn),但是在緩坡地帶,該比例回升了3.19個(gè)百分點(diǎn)�？傮w來說,河田盆地的林下水土流失狀況有一定改善。
[Abstract]:At home and abroad, there are few researches on regional discrimination of soil and water loss under forest, and it is a difficult problem to use computer to identify soil and water loss automatically under forest. Based on remote sensing technology, a typical soil erosion area of Changting County, Fujian Province, in which the Hetian Basin of Changting County, Fujian Province was selected as the study area, was used to establish a discriminant model of soil and water loss under the forest, taking into account three factors, vegetation coverage, vegetation health and slope. The soil and water loss area under the forest in the river basin was extracted, and the quantitative estimation and dynamic monitoring of soil and water loss area under the forest were realized. The results show that the soil and water loss area under the forest in Hetian basin is mainly distributed in the gentle slope zone from 2011 to 2014. The proportion of the total area of soil erosion under the forest to the total area of forest land is reduced from 22.13% to 21.94%, which is 0.19% lower than that of the previous year, but in the gentle slope area, The ratio rose by 3.19 percentage points. Generally speaking, the soil and water loss under the forest in the river basin has been improved to some extent.
【作者單位】： 福州大學(xué)環(huán)境與資源學(xué)院;福州大學(xué)遙感信息工程研究所;福建省水土流失遙感監(jiān)測評(píng)估與災(zāi)害防治重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家科技支撐項(xiàng)目(2013BAC08B01-05) 福建省教育廳重點(diǎn)項(xiàng)目(JA13030)
【分類號(hào)】：S157;TP79

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本文編號(hào)：2141313