The Study On Impact Of Underlying Surface Changes Upon Flood Disaster Under Low-carbon Model

Carbon cycle, land-use change and flood disaster risk are all important researchtopic related to the social sustainable development of a regional, by the support ofGIS technology, this article take Haihe Basin as a study area, has studied theunderlying surface change on impact of flood disaster research based on the carbonfootprint according to land use, soil, vegetation and DEM and other data resources.The main research contents and results are as follows:(1)Land use, soil and vegetation data are used to accounts for vegetation carbonsequestration capacity of different land use types. It shows that average vegetationcarbon level is about4.37C/m2, forest has the highest level of carbon sink with20.2gC/m2, the total capacity of vegetation carbon sink is about1.40TgC/yr, andcarbon absorption levels of vegetation in Haihe basin are below national average.(2)The carbon accumulation abilities of the different land use types in Haihebasin are accounted, accounting results show that: the vegetation carbon storage is2.16108T, the average vegetation carbon density of about0.67kg/m2in Haihe basin;soil organic carbon storage within1m thickness is about24.85108T and it’s densityis about7.85kg/m2, vegetation carbon density and soil organic carbon density are alllower than the national level.(3)Combined with the national land use planning outline (2006-2020)，the carbonsink and carbon accumulation effect evaluation are accounted before and after landuse planning. Results show that, the terrestrial ecosystem carbon sink capacity willincrease to2.74Tg in2020from2.10Tg in2000of Haihe Basin. In planning years(2020), the carbon storage will increase by52.94Tg than that of the current year (2000)the net carbon storage, wherein the vegetation carbon storage net growth is about24.11Tg and soil carbon reserves net increase by28.84Tg.(4)Considering the two aspects of flood disaster risk and the vulnerability, flooddisaster risk of Hayne basin is studied with DEM, land use and social economicstatistics and data from the flood control project. The distribution of flood disaster inHayne River Basin has a obvious regularity, areas that are in east of TaihangMountain and the southern of Yanshan have higher flood disaster risk index, mostlybelongs to the moderate or higher level of risk. Instead of medium-high or high levelflood risk, region in the west of Taihang Mountain zone mostly are with medium-lowor low level risk of flood disaster.(5) Two different land use patterns of the current year (2000) and the planningyear (2020) are chosen to study impact on flood disaster of land use pattern. It is found that land use after planning has lower danger index of flood disaster, withchanging from0.445to0.430in mountain and plateau areas and the opposite ischanging from0.562to0.564in plain areas. Social economic development makes thebearing body of flood disaster with the vulnerability raised and the increase is larger.Combined two aspects of flood risk and the vulnerability of bearing body, the flooddisaster risk of planning years (2020) is higher than the current year.