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| Research on Temporal and Spatial Dynamics of Water Conservation Function in Hunchun Natural Forest Protection Project Area Based on InVEST Model |
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| DOI：10.16768/j.issn.1004-874X.2022.04.007 |
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| Hits: 1329 |
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| Abstract: |
| 【Objective】The research was carried out to scientifically evaluate the water conservation function
of Hunchun Natural Forest Protection Project area, with a view to providing a basis for ensuring rational utilization of
regional water resources and formulation of national ecological security policy.【Method】Based on the multi-period land
resources statistics data, forest resources archives and meteorological data, the temporal and spatial dynamic characteristics
of water conservation function after the implementation of Natural Forest Protection Project was explored based on
InVEST model, and grey relational analysis was adopted to study the influencing factors of water conservation function.
【Result】Since 2000, the area of forestland in Hunchun area has increased by 16 793.25 hm2
; the water conservation
of Natural Forest Protection Project in the first phase (2000-2010)has decreased by 5.67×108
m3
and decreased by
1.02×108
m3
in second phase (2010-2015), while it increased by 4.97×108
m3
during 2015-2020; water purification function has seen steady improvement though fluctuation existing, among which the mean outputs value of N and P have decreased from
0.1806 kg/hm2 to 0.1703 kg/hm2 per year and 0.0206 kg/hm2 to 0.0200 kg/hm2 per year in 20 years. Forest volume, precipitation
and output value of primary industry have been the most influential indexes for water conservation function.【Conclusion】The
implementation of Huinchun Natural Forest Protection Project has effectively improved the water conservation function, and the
research results can provide support for scientific decision-making of the government, and strengthening of resource protection
and management as well as public protection awareness. |
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