Application of ArcGIS in the Calculation of Basins Rainfall-Runoff

AbstractIt is key issue to predict the rainfall-runoff process on the Kuronagi River before the joint sediment flushing and sluicing of Dashidaira and Unazuki dams at the downstream of the Kurobe River. In this paper, the ArcGIS system is used to produce the digital basin of the Kuronagi River, the distributed Kinematic Wave hydrological model is used to calculate the rainfall-runoff process on the Kuronagi River, and the results are in good agreement with the observations. The results show that with the progress of rainfall observation techniques and computational methods, the development of digital land information and the effective application of GIS technology, a relatively simple rainfall-runoff model can get higher precision results

Efficient Simulation for Fixed-Receiver Bistatic SAR with Time and Frequency Synchronization Errors

Time and frequency synchronization is the key technique of bistatic synthetic aperture radar (BiSAR) system, and raw data simulation is an effective tool for verifying the time and frequency synchronization techniques. According to the two-dimensional (2-D) frequency spectrum of fixed-receiver BiSAR with time and frequency synchronization errors, a rapid raw data simulation method is proposed in this paper. Through 2-D inverse Stolt transform in 2-D frequency domain and phase compensation in Range-Doppler frequency domain, this method can realize two-dimensional spatial variation simulation for fixed-receiver BiSAR with time and frequency synchronization errors in a reasonable time consumption. Then the simulation efficiency of scene raw data can be significantly improved. Simulation results of point targets and extended scene are presented to validate the feasibility and efficiency of the proposed simulation method