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### 基于InVEST模型的甘肃白龙江流域生态系统碳储量及空间格局特征

1. 1. 兰州大学资源环境学院西部环境教育部重点实验室,兰州 730000
2. 广西师范学院北部湾环境演变与资源利用教育部重点实验室,南宁 530001
• 收稿日期:2016-01-27 修回日期:2016-05-20 发布日期:2016-09-22
• 作者简介:

作者简介:张影,女,黑龙江绥化人,硕士生,主要从事土地利用变化与景观生态研究。E-mail:zhy14@lzu.edu.cn

• 基金资助:
国家自然科学基金项目（41271199）;甘肃省民生科技计划项目（1503FCME006）

### Carbon storage and spatial distribution characteristics in the Bailongjiang Watershed in Gansu based on InVEST model

ZHANG Ying1(), XIE Yuchu1,2, QI Shanshan1, GONG Jie1(), ZHANG Lingling1

1. 1. Key Laboratory of Western China’s Environmental Systems （Ministry of Education）,College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China
2. Key Laboratory of Environment Change and Resources Use in Beibu Gulf （Ministry of Education）,Guangxi Teachers Education University,Nanning 530001,China
• Received:2016-01-27 Revised:2016-05-20 Published:2016-09-22

Abstract:

Research into the spatial distribution characteristics of carbon storage plays an important role in ecosystem carbon pools and management. Based on the carbon module of InVEST and GIS,the Bailongjiang watershed in Gansu,China was selected as a case study to estimate carbon storage and analyze the impact of vegetation types,elevation,slope and slope direction for the spatial distribution of carbon storage. The total carbon storage of the watershed was 251.57 TgC,and the average carbon density was 136.46 MgC/hm2. Among them,the soil carbon storage accounted for 202.20 TgC while vegetation carbon storage was 49.37 TgC,soil carbon storage was the main part of the total carbon storage in the Bailongjiang watershed. The spatial distribution of carbon storage was concentrated in the northwestern mountain forest region （e.g. Diebu Count）and the southern area of Baishuijiang （e.g. Baishuijiang National Nature Reserve）. Spruce and fir and evergreen coniferous forest occupied the largest vegetation carbon in the watershed;the value in the eastern and southeastern part of the study area was lower,such as in Wudu District and the northeast part of Tanchang,and the carbon storage in alpine sparse vegetation area was the lowest. Carbon storage had apparently spatial differentiation with the zonality of elevation,slope and slope direction in the Bailongjiang watershed. The watershed carbon storage increased with increasing elevation,then decreased with increasing elevation. Most of the watershed carbon storage was distributed between 1500m to 3500m and 25° to 40°. Carbon storage was higher in the areas belonging to shady slope and semi-shady slope than that of semi-sunny slope and sunny slope. These results can be used for the governance of ecosystem carbon pools and human activities at the watershed scale.