Riverway Evolvement Analysis in Beijiang River, South China between 1975-2001 by Romte Sensing and Geography Information System

The waterfront change and the beachfront stability are the harbor route project, the riverbed evolution analysis, and the waterfront resources use important research topic. The remote sensing technology in the inland river beach front evolution analysis application, made up the flaw which the conventional method material was insufficient, the remote sensing Image has been possible real, concrete, vividly to reflect at that time under the pad surface situation, when the remote sensing technology had the multi- platforms, were many and the multi- resolution characteristic, satisfied the different criterion, the different goal work request; At the same time the remote sensing method gain waterfront can macroscopic, comprehensive, celerity, direct-viewing reflect the beach front vicissitude situation, according to the above the forecast beach front evolution tendency and carries on the river course to evolve the analysis to have the suitable reliability. This research uses the remote sensing (RS) and the geographic information system (GIS) the technology, the altogether 7 time satellites remote sensing information carried on computer processing to the Beijiang River downriver watercourse from 1975 to 2001, contrasted for 26 years river course characteristic information, has analyzed the Beijiang River downriver various sections of river riverbed trend and flushes the silt change, and union river bed aspect and so on boundary condition, hydrology silt condition and human activity carried on the generalized analysis, the forecast river potential development tendency.