Headwater Conservation Evaluation of Forest Resources in Xichuan County Based on InVEST Model

doi:10.13466/j.cnki.lyzygl.2017.03.011

Abstract

Abstract:

With xichuan county as the research object,headwater conservation function is analyzed in 2004,2009 and 2014 by using the Invest model. The results showed that:(1)The headwater conservation function is better in western and northern regions of Xichuan,and is poor in the southeast.(2)The headwater conservation of the areas with high forest cover was significantly better than that of the areas with low forest cover.(3)The highest headwater conservation amount per year is arbor forests with 300.51mm,and the lowest is other woodland with 44.83mm. The order of headwater conservation amount of forest resources per year from high to low is arbor forests,shrub land,open forest land,immature forest land,nursery land and other woodland.

Key words: InVEST model, forest resources, headwater conservation

CLC Number:

S715.7

YANG Ying, WANG Lixin, REN Weihua, ZHENG Dongmei, ZHI Changgui. Headwater Conservation Evaluation of Forest Resources in Xichuan County Based on InVEST Model[J]. FOREST RESOURCES WANAGEMENT, 2017, (3): 51-55.

Figures/Tables 4

Tab.1

Fig.1

Tab.2

Tab.3

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林地地类	ETk	RootDepth	Vel_coef
乔木林地	1000	5000	200
疏林地	900	3000	300
灌木林地	900	2000	249
未成林地	850	1500	400
苗圃地	650	500	600
其他林地	800	700	500

年度	合计	乔木林地	灌木林地	疏林地	未成林地	苗圃地	其他林地
2004	3.79×10⁸	3.43×10⁸	1.33×10⁷	5.42×10⁶	4.01×10⁶	2.53×10⁵	1.29×10⁷
2009	3.67×10⁸	3.38×10⁸	1.13×10⁷	4.89×10⁶	3.78×10⁶	2.15×10⁵	8.45×10⁶
2014	2.99×10⁸	2.83×10⁸	8.30×10⁶	3.66×10⁶	9.45×10⁵	1.53×10⁵	3.15×10⁶

年度	年降水量	乔木林地	灌木林地	疏林地	未成林地	苗圃地	其他林地
2004	841	347.47	295.59	238.7	178.29	126.03	52.42
2009	785	314.16	250.35	214.74	158.16	107.15	45.94
2014	688	239.89	183.04	162.24	119.1	76.25	36.12
3年均值	771	300.51	242.99	205.23	151.85	103.14	44.83

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