Using the data of wheat spectrum and water content in 6th April and 23rd April, we figure out the values of NDVI, NDWI, GVMI, PVI and WI, which are among the most frequently used water indices, and make correlation and regression analyze between these indices and EWT and FMC, two indices indicate the water content of wheat leaves. Through analysis and comparison, we find that FMC has a better correlation with water indices than EWT in this period, that in different period the best water index to monitor the water content of wheat is different, and that along with the growth of wheat, the effect of these indices in monitoring water content of wheat becomes much better.
Emergency management agencies will organize people to evacuee when disasters are forecasted. However, contradictions between individual behavior and group objective appear frequently during large-scale evacuations, the problem is obviously in the process of fisher boats evacuation. So, this paper set up fisher boats evacuation simulation model considering individual desire of back harbor.In the agent-based model, Typhoon and harbor are inactive agents, government and fisher boats are active agents. Fisher boats make decisions whether back to harbor and which harbor to be choose according of typhoon forecast information and government instruction. The model uses the harbors of Zhejiang province as a case.
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