RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (04): 613-620.doi: 10.11870/cjlyzyyhj201604011

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EFFECT OF REGIONAL LAND-USE CHANGE ON SOIL ORGANIC CARBON STORAGE BASED ON SD AND CLUE-S MODEL

TIAN Duo-song1, FU Bi-tian1, LV Yong-peng1,2, YANG Kai1, CHE Yue1   

  1. 1. Shanghai Key Laboratory of Urbanization and Ecological Restoration, East China Normal University, Shanghai 200241, China;
    2. Shanghai Municipal Engineering Design Institute (Group) CO., LTD., Shanghai 200092, China
  • Received:2015-08-03 Revised:2015-11-25 Online:2016-04-20
  • Supported by:
    National Natural Science Foundation of China (51408225); Research Project of Shanghai Environmental Protection Bureau “Investigation and assessment of ecological environment in Shanghai”

Abstract: Carbon cycle or carbon balance is altered by human activities and carbon storage, especially soil organic carbon storage has become the focus of the world. Therefore, predicting the future carbon storage and selecting proper regional development paths have immense values. By taking Chongming Island as an example, this paper predicts its land use demand from 2011 to 2030 using the SD model, and then simulates landuse spatial distribution by the CLUE-S model. Finally, this study investigated the effect of land use changes on carbon storage under three development scenarios. Total population, GDP, urban construction land, agricultural land, forest and orchard land, urban green land, water and swamp area and other land are the level variables of the SD model. Remote sensing data of 2000, 2005 and 2010 years and statistical data of Chongming County Statistical Yearbook are the basic data of the paper. Testing stage of the SD model is from the year 2000 to 2010 and simulation stage is from 2011 to 2030.Based on the trend of historical development and some regional future plans, three scenarios (L, A and H) have been built up in the next decades. L means the development pattern with a low developing speed, A means the economic development pattern at a current developing speed, and H means the development pattern with a high developing speed. There are 12 driving factors in the CLUE-S model such as the distance of main towns, important towns, rural settlements, main roads, secondary roads, main rivers and wetland reserves, per capita GDP, population density, urbanization level, road density and river density. The results of logistic regression are used to check the availability of driving factors and land-use spatial distribution, which indicates that the value of ROC is appropriate. The results reflect that total soil carbon storage declines slowly and the decreasing rate is 1.40% and 1.32% from 2010 to 2020 and 2020 to 2030 during the study periods, respectively. The influence of human activities on the total soil carbon reserves is weak, but the influence of one single land use type is serious. For instance, in the H scenario, the declining rate of total soil carbon storage is 2.72% from 2010 to 2030,while the decreasing rate of carbon storage in agricultural land and forest and orchard land is 30.13% and 126.60%, respectively. L scenario is selected as the better development pattern with the largest total soil carbon storage. L, A and H scenario in 2030, the soil carbon storage of which are 3093.03×106kg, 3079.47×106kg and 3059.81×106kg, respectively. It is reasonable and practical to simulate and calculate the ecosystem carbon storage by the coupled SD and CLUE-S models in both temporal and spatial scales. This paper then proposes some useful suggestions to reduce the impact of human activities on soil carbon process, such as strengthening farmland protection, promoting forest construction and improving land-use structure.

Key words: SD model, CLUE-S model, land use, carbon storage, Chongming Island

CLC Number: 

  • X321
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