水保所知识产出(1956---)知识库

区域碳储量是生态系统功能的重要度量指标，探索土地改造对区域碳储量变化的影响，对于协调区域生
态建设和生态产业发展具有重要意义。基于InVEST模型和地理信息系统技术，研究了陕西省延安南部麻塔流域
1999—2016年土地结构改造过程中区域碳储量变化，并探讨坡度、坡向、坡位对碳储量空间分布的影响。结果表
明：麻塔流域 18 a 的土地改造使得区域碳储量增加 1688.36 Mg（碳密度增加 6.92 Mg·hm 2 ），总固碳功能提升约
7.63%。森林、草地和果园土地类型面积的增加是植被转换后流域景观碳储量提升的主要贡献者。碳储量增加的
空间位置主要分布在半阴坡、中上坡位以及坡度10°~30°。本研究认为林草植被建设和经济果林建设两者都有利
于增强麻塔流域景观固碳能力。麻塔流域土地转换模式能够协调区域生态建设和生态产业的发展，在黄土丘陵区
具有较好的推广价值。

The soil and water conservation forests in the areas surrounding Yan􀆳an city are being replaced by
economic forests such as orchard, which will definitely have an impact on the regional carbon storage. Therefore,
it is necessary to determine a method to quantify the impact of orchard construction on the regional carbon
storage capacity. Based on the InVEST model and ArcGIS platform, this study evaluated the change in carbon
storage in the Mata Watershed in southern Yan’an from 1999 to 2016, and explored the influence of slope, slope
aspect, and slope position on the spatial distribution of change in carbon storage. The results showed that the
carbon storage of forest, grassland, and orchard has increased, whereas that of shrub, cropland, and other lands
has declined during the 18 years of vegetation and reconstruction in the Mata Watershed (mainly orchard
construction). The regional total carbon storage has increased by 7.63%, of which 39.71% has been contributed
by orchard. The increase in spatial position of carbon storage was mainly located in half-shaded-slopes, middle,
and top of slopes; as well as slopes with range of 10°-30°. This study provides a methodological case study for
quantifying the impact of economic forest construction on regional carbon storage function in the loess hilly
region.