| 退耕还林(草)以来陕北白于山区植被覆盖与 土壤侵蚀强度变化 |
| 黑哲1,3; 王飞1,2,3; 韩剑桥1,2; 史尚渝1,3; 戈文艳1,2
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| 2020
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发表期刊 | 水土保持研究
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卷号 | 27期号:4页码:39-46 |
摘要 | 为了研究白于山区土壤侵蚀特征,基于 MODIS - NDVI 和 Landsat 影像、 DEM 和土地利用数据,分析了白于山
区 2000 — 2018 年植被盖度时空变化规律,并结合坡度和土地利用资料评估了退耕还林(草)工程以来的土壤侵蚀强度
变化状况。结果表明:( 1 )白于山区植被覆盖呈显著增加趋势,年均 NDVI增幅为0.
065 / 10a ( p <0. 01 );( 2 )白于山
区 NDVI 具有明显的空间分异性,高植被覆盖区主要集中在吴起县,低植被覆盖区主要集中在定边县西部和靖边县
中部;受到地形因子的影响, NDVI分别在海拔1 250~1 400m ,坡度50°~56°范围内达到最大值,且阴坡植被覆盖大
于阳坡;( 3 )白于山区植被盖度整体呈显著增 加趋势,植 被 退 化 面 积 与 恢 复 面 积 分 别占研究区面积的 3.18% ,
64. 20% ;( 4 )白于山区轻度侵蚀和中度侵蚀的面积减少,但强烈侵蚀、极强烈侵蚀和剧烈侵蚀的面积增加;( 5 )土壤侵
蚀强度减弱的面积占总面积的 51. 30% ,主要集中在吴起县,农耕地面积的减少是土壤侵蚀改善的主要原因。 |
其他摘要 | In order to explore the characteristics of soil erosion in Baiyushan Mountain area , based on the datasets of
MODIS - NDVI ( Normalized Difference Vegetation Index ), Landsat , DEM and land use data , we analyzed the
regional vegetation cover change in Baiyushan Mountain area from the initiation of the Grain - for - Green Project of
China in 2000till 2018 , and assessed the soil erosion intensity with information of slope and vegetation coverage.The
results are shown as follows. ( 1 ) The annual average NDVI of the Baiyushan Mountain area had increased signicifi -
cantly ( p
<0. 01 ) with a rate of 0.
065 / decade over the study period. ( 2 ) The regional distribution of NDVI varied
obviously spatially , and the vegetation cover in Wuqi was high but that in the western of Dingbian and the
central of Jingbian were quite poor ; the vegetation cover in the study area reached a relative high level at the
altitude ranges of 1 250~1 400mand the slope ranges of 50°~56° , and the vegetation cover on shady slopes
was much greater than that on the slopes to southern part. ( 3 ) The areas with vegetation degradation and the
vegetation recovering accounted for 3.18% and 64.20% of the total area
, respectively , and the vegetation
cover increased obviously during the whole period.
(
4 ) The areas suffering mild erosion and moderate erosion
reduced , but the areas with intensive erosion , strong erosion and severe erosion increased. ( 5 ) The area withsoil erosion decline accounted for 51. 3% of the total area , mainly occurred in Wuqi County , and the main
reason for erosion decline is the reduction of agricultural land area on the slopes. |
关键词 | 植被覆盖变化
归一化植被指数
土壤侵蚀风险
白于山区
退耕还林(草)
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收录类别 | 中文核心期刊要目总览
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语种 | 中文
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文献类型 | 期刊论文
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条目标识符 | sbir.nwafu.edu.cn/handle/361005/10101
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专题 | 水保所知识产出(1956---)
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作者单位 | 1.中国科学院 水利部水土保持研究所 2.西北农林科技大学水土保持研究所 3.中国科学院大学
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推荐引用方式 GB/T 7714 |
黑哲,王飞,韩剑桥,等. 退耕还林(草)以来陕北白于山区植被覆盖与 土壤侵蚀强度变化[J]. 水土保持研究,2020,27(4):39-46.
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APA |
黑哲,王飞,韩剑桥,史尚渝,&戈文艳.(2020).退耕还林(草)以来陕北白于山区植被覆盖与 土壤侵蚀强度变化.水土保持研究,27(4),39-46.
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MLA |
黑哲,et al."退耕还林(草)以来陕北白于山区植被覆盖与 土壤侵蚀强度变化".水土保持研究 27.4(2020):39-46.
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文件名:
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退耕还林_草_以来陕北白于山区植被覆盖与土壤侵蚀强度变化_黑哲.pdf
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格式:
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Adobe PDF
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