5.3 Establish the dynamic investment mechanism of the GFG
The SCP, the GFG investment and the SCE are not isolated states, but constitute a complete system together, and there are dynamic circulation characteristics between each other. Specifically, the SCP calculated by the theoretical model can provide decision-makers with the investment intensity of GFG in different regions for a while in the future, to achieve the economical and intensive utilization of resources and reduce the cost of policy implementation. The investment of GFG will inevitably reduce the amount of soil erosion in the region and produce a certain SCE. At the same time, the dynamic change of SCE and the interference of external factors will modify the SCP accordingly, so as to provide a reference for the key input direction of the GFG in the next stage (Figure 6). Through the continuous circulation among the three, the ideal SCE is finally achieved.
[Figure 6 near here]
Therefore, in order to optimize the GFG, it is suggested to establish the GFG dynamic investment mechanism. In the future formulation of the GFG plan, an appropriate implementation period should be set on the basis of full consideration of the SCP. Considering the time delay of vegetation growth and development, this period should have a large time span. After the implementation period is reached, the new SCP is calculated, and based on this adjustment, the implementation plan for the next stage is formulated.