干旱区生态环境知识资源中心(Arid): 基于RS与GIS的内蒙古武川县退耕还林生态成效监测

Arid

	基于RS与GIS的内蒙古武川县退耕还林生态成效监测
其他题名	Monitoring effects of ecosystem restructuring project for returning grain plots to forestry in Wuchuan county of Inner Mongolia based on RS and GIS
	汪芳甜; 安萍莉; 蔡璐佳; 黄鑫鑫; 郝晋珉
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2015
卷号	31 期号:11 页码:269-277
中文摘要	为监测半干旱地区退耕还林工程实施的效果,基于MODIS NDVI时间序列数据及土地利用数据,该文对内蒙古武川县的土地利用变化及植被覆盖变化进行了研究。结果表明:1)2000-2013年,武川县植被覆盖呈增加趋势发展的面积占33.55%,呈减少趋势发展的面积占30.15%,无显著变化的占36.30%,植被覆盖变化的空间差异明显,植被退化的区域重点集中于武川县的西北部。2)1999-2010年间,研究区耕地面积净减少18 809.29 hm~2,耕地转为草地13 873.48hm~2,转为林地5 429.81 hm~2,草地转为林地13 554.25 hm~2;结合地形特征,退耕地重点分布于>2°~15°坡度与>1 500~2 000 m海拔范围,并随着坡度与海拔的增加,退耕的幅度越来越大。3)退耕区中,植被覆盖下降的面积占20.98%,植被覆盖增加的面积占43.89%;在非退耕区,植被覆盖下降的区域面积占29.40%,植被覆盖增加的占34.14%。整体来看,退耕区植被的改善程度要高于非退耕区。4)进一步分析发现,退耕区中,耕地-草地的植被呈退化趋势发展,退化区域集中于>2°~15°坡度与>1 500~2 000 m海拔范围;在耕地-林地与草地-林地区域,其整体植被覆盖均显著提高,其中,耕地-林地的植被改善区域集中于>2°~6°坡度与>1 500~1 750 m海拔范围,草地-林地的植被改善区域重点分布于>6°~15°、>2°~6°及>15°~25°坡度范围与>1 500~2 000 m海拔范围。在非退耕区,耕地保持区、林地保持区与林地-草地区域的植被覆盖整体增加,而草地保持区、草地-耕地与草地-沙地区域的植被覆盖整体下降。
英文摘要	In order to monitor effects of ecosystem restructuring project under the government Grain for Green program, this paper, based on the MODIS NDVI time series data and land use change data, explored the regional land use change and consequently vegetation coverage change in Wuchuan county, Inner Mongolia, by using linear regression and remote sensing interpretation. Results showed that from 2000 to 2013, the annual maximum NDVI of study area was not improved progressively at all. But the vegetation coverage change of the whole area showed obvious spatial difference, the vegetation coverage with significant (P < 0.05) increase accounted for 33.55% of the total study area, while significant (P<0.05) decrease of vegetation cover area was 30.15%, and the degraded area of the whole area mainly distributed in the northeast of Wuchuan county. The results also showed that from 1999 to 2010, generally speaking, the area of cultivated land in the studied area decreased by 18,809.29 hm~2, which was mainly distributed in slope between 2° and 15° or altitude between 1,500 m and 2,000 m above sea level, and the proportion of returning farmland to forest and grass increased with slope and altitude within certain range. Overall a majority of steep slope land had been returned to forest and grass. Compared with 1999, there were 13,873.48 hm~2 of the cultivated land converted to grassland, and at the same time, 5,429.81 hm~2 of cultivated land converted to forests. In addition, in the area under Grain for Green program, the areas with degraded vegetation coverage accounted for 20.98%, and those with improved vegetation coverage accounted for 43.89%. In the area without the program, the areas with degraded vegetation coverage accounted for 29.34%, and the percentage of areas with improved vegetation coverage was 34.12%. In all, the vegetation coverage of the area under the program has been better than the area without the program since 2000. Last, from the specific land use change type, in the area under the program, the vegetation coverage of grassland returned from cropland experience improvement, the improved areas and degraded areas accounted for 34.65% and 30.45% of the total area in "cropland-grass" area. The degradation area is 4224.20hm~2, and mainly distributed in slope between 2°and 15° slope or altitude between 1,500 m and 1,750 m. By contrast, both of the vegetation coverage of forest returned from grassland and cropland experienced great improvement, and the improved proportions respectively accounted for 49.39% of the "cropland-forest" area and 51.14% of the "grass-forest" area. Among which ,the improved areas of the forest returned from cultivated land mainly distributed in slope between 2° and 6° or altitude between 1500 m and 1750 m, and the improved areas of forest returned from grass mostly located in slope between 6°and 15°or altitude between 1750 m and 2000 m. Furthermore, in non-ecological area, vegetation coverage of the areas in "cropland-cropland" region, "forest-forest" region and "grass-forest" region experienced great improvement, the proportions of vegetation coverage improved areas among these land use type changes were separately 38.48%, 46.14%, 38.80%. While in other regions of non-ecological area, the vegetation coverage of the areas in "grass-grass" region, "grass-cropland" region and "grass-sand" region degraded markedly, and the proportions of degraded areas among those land use type changes were separately 31.06%, 35.79%, 62.61%.
中文关键词	土地利用 ; 植被 ; 生态 ; 监测 ; 退耕还林工程 ; 覆盖 ; 武川县
英文关键词	land use vegetation ecology monitoring grain for green project cover Wuchuan county
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:5461206
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378850
作者单位	汪芳甜, 中国农业大学资源与环境学院, 北京 100193, 中国.; 安萍莉, 中国农业大学资源与环境学院, 北京 100193, 中国.; 蔡璐佳, 中国农业大学资源与环境学院, 北京 100193, 中国.; 黄鑫鑫, 中国农业大学资源与环境学院, 北京 100193, 中国.; 郝晋珉, 中国农业大学资源与环境学院, 北京 100193, 中国.
推荐引用方式 GB/T 7714	汪芳甜,安萍莉,蔡璐佳,等. 基于RS与GIS的内蒙古武川县退耕还林生态成效监测[J],2015,31(11):269-277.
APA	汪芳甜,安萍莉,蔡璐佳,黄鑫鑫,&郝晋珉.(2015).基于RS与GIS的内蒙古武川县退耕还林生态成效监测.农业工程学报,31(11),269-277.
MLA	汪芳甜,et al."基于RS与GIS的内蒙古武川县退耕还林生态成效监测".农业工程学报 31.11(2015):269-277.