Finite-time stability and optimal control of an impulsive stochastic reaction-diffusion vegetation-water system driven by Levy process with time-varying delay

In this paper, a reaction-diffusion vegetation-water system with time-varying delay, impulse and Le ' vy jump is proposed. The existence and uniqueness of the positive solution are proved. Meanwhile, mainly through the principle of comparison, we obtain the sufficient conditions for finite-time stability which reflect the effect of time delay, diffusion, impulse, and noise. Besides, considering the planting, irrigation and other measures, we introduce control variable into the vegetation-water system. In order to save the costs of strategies, the optimal control is analyzed by using the minimum principle. Finally, numerical simulations are shown to illustrate the effectiveness of our theoretical results.