Based on the study on desert's age and distributing spatial state in Huanghe headstream by remote sensing information, the results show that the desert's age is younger, that the spatial structure models are as follows: patch diffusion pattem, belt and branch pattern, belt pattern.

This paper summarizes the background,methods and results concerning the study of Wave control based upon the large space structures in recent years,and overviews some prospects for a few basic problems in structural wave control.