Vegetation Coverage Dynamics and Its Driving Factors in Inner Mongolia Based on FVC Information Entropy

doi:10.13466/j.cnki.lyzygl.2019.04.023

Abstract

Abstract:

In order to explore the temporal and spatial evolution of vegetation coverage in Inner Mongolia,based on the MOD13Q1 data from 2005 to 2018,and uses Fractional Vegetation Coverage(FVC) as the main indicator to analyze the change of vegetation coverage.Using information entropy,FVC index and other methods analyze the intensity and trend of vegetation coverage in Inner Mongolia.By using GIS spatial analysis method,the influence of river,precipitation and topography on vegetation coverage is analyzed.The results show that:(1) From the time point of view,between 2005 and 2015,the intensity of vegetation coverage in Inner Mongolia is relatively stable,and the trend of change shows a slow increase trend.(2) From the perspective of space,in 2005—2018,the degree of vegetation degradation in Inner Mongolia is high in the east and low in the west,and there is obvious longitude and zonal change that the vegetation coverage from east to west is getting lower and lower.(3) Precipitation,mining areas,rivers and topography are all influencing factors of vegetation coverage change.In areas with abundant rainfall,vegetation coverage is often high;vegetation coverage in mining areas is lower than non-mine areas;river development provides good water conditions for vegetation growth.The vegetation coverage is higher in the area near the river;the different terrain has a significant impact on the vegetation coverage.The low-gradient and low-altitude areas are more suitable for the growth of vegetation than the steeper and higher elevation areas.

Key words: fractional vegetation coverage, Inner Mongolia, time information entropy, vegetation change

CLC Number:

P237
X835

WANG Jin, YAN Qingwu, TAN Xueling, ZOU Yajing. Vegetation Coverage Dynamics and Its Driving Factors in Inner Mongolia Based on FVC Information Entropy[J]. FOREST RESOURCES WANAGEMENT, 2019, 0(4): 159-167.

Figures/Tables 10

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影响因素	分级	极低覆盖面积百分比	低覆盖面积百分比	中覆盖面积百分比	中高覆盖面积百分比	高覆盖面积百分比
年均降水量/mm	32~116	51.990	22.150	8.100	3.972	13.79
	116~202	0.971	4.776	9.769	8.185	76.30
	202~291	0.046	0.825	1.226	1.038	96.87
	291~389	0.003	0.065	0.277	0.481	99.17
	389~627	0.025	0.042	0.173	0.415	99.35
距河流距离/m	1000	5.59	3.50	4.04	3.22	83.64
	2000	6.91	3.01	4.21	3.35	82.52
	3000	7.91	3.19	4.35	3.58	80.98
海拔高度/m	85~489	0.08	0.76	1.61	1.79	95.76
	489~839	2.68	0.68	2.68	3.71	90.25
	839~1149	30.99	13.21	4.17	3.06	48.57
	1149~1446	38.58	18.99	12.15	5.85	24.43
	1446~3522	36.9	19.57	9.72	6.03	27.78
坡度/(°)	0~6	29.66	14.26	7.71	4.65	43.73
	6~15	9.34	3.05	2.48	2.74	82.39
	15~25	6.10	4.25	1.36	1.28	87.01
	25~35	10.58	15.61	3.43	2.07	68.30
	35~45	14.18	35.53	6.48	3.80	40.00
	>45	14.37	49.80	4.77	3.69	27.37
距矿区距离/m	500	3.19	4.70	18.09	20.29	53.73
	1000	3.00	4.02	17.09	19.59	56.30
	1500	3.01	3.93	16.09	17.32	59.66
	2000	3.31	3.89	15.20	15.41	62.19