Dissertation
Dissertation > Environmental science, safety science > The basic theory for the Environment and Science > Environmental Earth Science > Environmental geography

Studies on Temporal and Spatial Variation of the Capacity and Value of Soil Carbon Storage in Regional Farmland Based on GIS

Author LiuLiuHui
Tutor XingShiHe
School Fujian Agriculture and Forestry University
Course Soil
Keywords Geographic Information Systems Topsoil Carbon stocks Carbon value Temporal and spatial variation Partition
CLC X144
Type Master's thesis
Year 2009
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The study Tongan District, Xiamen farmland for the study, the Tongan District second soil survey (1983) and cultivated land fertility survey (2006) samples topsoil organic matter in the plow layer thickness and soil texture survey analysis data, bulk density of the survey data, combined with different soil texture types with the integration technology of GIS and mathematical models to estimate and the establishment of the 1983 and 2006 Tongan District farmland topsoil carbon storage and carbon density raster spatial database; damage evaluation method, the abatement cost method five methods of the market price method, the shadow price method and the replacement cost method mean estimates the Tongan District arable topsoil carbon value, and the establishment of Tong'an District farmland soil carbon value raster spatial database in 1983 and 2006, and then carry out the Tongan District arable soil carbon stocks, carbon density and carbon value of temporal and spatial variation analysis and zoning evaluation. The study results show that: 1,1983 and 2006, the Tongan District arable topsoil carbon density ranged from 1.004 kg/m2 ~ 4.208 kg/m2 and 0.351 kg/m2 to 3.781 in kg/m2, mean were 2.179 kg/m2 1.758 kg/m2. The region's farmland topsoil carbon density spatial variability significantly lower carbon density townships including southeastern five significant Hongtang, Xinmin and the phoenix South Farm, high carbon density township is located in the northwest of the Lotus, Ting River Xike Town and south of the region in 1983 and 2006, farmland topsoil carbon density showed a spatial variation northwest to southeast. 2, Tongan District in 1983 and 2006, the total reserves of arable topsoil carbon were 2.25 × 108 t and 1.82 × 108 t soil carbon storage space differences Clearly, the 1983 high carbon stocks township northwest Lotus and Ting Town, the total carbon stocks accounted for 50.24% of the total reserves of the region's carbon, high carbon stocks in 2006 the township, including Lotus, five significant Ting Town, the total carbon reserves accounted for 64.11% of the total reserves of the region's carbon The region's the farmland soil carbon reserves also was lower in the southeast northwest high spatial distribution of basic. 3, of Tongan District 1983 and 2006, the total value of arable topsoil carbon were $ 4.735 billion and $ 3.82 billion, the obvious differences in soil carbon value space 1983 of farmland topsoil carbon value varied from $ 070 million to 15.03 billion U.S. dollars, an average of $ 592 million higher carbon value of township Lotus, Ting River and the town of five significant changes in the carbon value of the township; 2006 at $ 068 million to $ 1.074 billion, an average of $ 478 million, the carbon value The higher the township including Lotus, five significant Ting Town, the region's arable topsoil carbon value also showed low southeast northwest high spatial differentiation of. 4, Tongan District in 1983 and 2006 high-density area of ??arable topsoil carbon accounted for 11.71% and 1.95% of the total area of ??the region's arable land, the carbon density mean 3.486 kg/m2 and 2.823 kg/m2, respectively, are mainly distributed in Ting River and the town of Lotus. Medium density area, respectively, accounting for 62.44% and 72.06% of the total area of ??cultivated land, mean were 2.439 kg/m2 and 1.901 kg/m2, are mainly distributed in the Lotus, Xinmin and Ting Town. The low-density area of ??the total area of ??arable land accounted for 28.85% and 62.13%, respectively, mean 1.760 kg/m2 and 1.385 kg/m2 1983 low-density areas are mainly distributed in the five significant and Hung Town, mainly low-density area in 2006 distributed in five significant and Lotus town. , Tongan District in 1983 and 2006 accounted for 15.04% and 2.88% of the total area of ??the region's arable land area of ??arable topsoil carbon high reserves mean carbon stocks were the 34.42 t/hm2 and 27.11 t/hm2, are mainly distributed in Ting River and the town of Lotus. Respectively, accounting for 53.36% and 30.86% of the total area of ??cultivated land in reserve area, mean carbon stocks respectively for from 24.33 t/hm2 and 18.96 t/hm2, to the year 1983 the reservoir zone is mainly located in the town of Lotus in 2006, mainly distributed in the lotus and Ting Town. The low reserve area accounted for 31.60% and 66.26% of the total area of ??cultivated land carbon stocks mean of 17.66 t/hm2 14.06t/hm2, 1983 low reserves are mainly distributed in the five significant Hongtang 2006 mainly distributed in five significant, Lotus, Xinmin and Hung Town. Tong'an District 1983 and 2006, high-value area of ??arable topsoil carbon 1450.85 hm2 and 246.31hm2 respectively, accounting for 12.76% and 2.17% of the Tongan District, the total area of ??cultivated land is mainly distributed in the Ting River and the town of Lotus. In the value area of ??6491.74 hm2 and 3788.86 hm2 in, respectively, accounting for 57.09% and 33.32% of the total area of ??cultivated land in 1983 the value of the area is mainly distributed in the Lotus, Xinmin and Ting Town, 2006 in the value of the area is mainly distributed in the lotus The five significant Ting River, Hongtang and Xinmin Town, and Datong and Shohei streets. Low-value area of ??3428.72 hm2 and 7336.13 hm2 in accounting for 30.15% and 64.51% of the total area of ??cultivated land, the 1983 low-value areas are mainly distributed in the five significant Hongtang, Xinmin Town, and Datong and CHAPIN Street, and in 2006 the low value The area is mainly distributed in the five significant, Lotus, Xinmin Hongtang. 7,1983 to 2006 the Tongan District farmland topsoil carbon density and carbon stock changes, the overall downward trend. Raise and lower the region's carbon density of arable land accounted for 16.21% and 83.73% of the total area of ??cultivated land, elevated area of ??the larger township located five significant the Xike and Hongtang Datong, and Shohei streets, reduced area larger township is located in the Lotus, Ting River and Xinmin Town, for 23 years the region overall arable topsoil carbon density northwest majority of arable topsoil carbon density was southeast of local farmland topsoil carbon density increased decreased variation, the variation of the arable soil carbon storage and carbon density change is exactly the same. The arable topsoil carbon value and the total value of per unit area in the past 23 years showed reduced to varying degrees, elevated carbon value of arable land accounted for 25.42% of the total area of ??arable land, of which five,, Hongtang Xinmin Town, as well as Datong and SUNFAX Street carbon relatively large value increased area of ??the carbon value of the reduction of arable land accounted for 14.34% of the region's total cultivated area, reducing the area of ??the larger Lotus and Ting Town, the region per unit area of ??arable topsoil carbon value change showing an overall soil carbon density variation.

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