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一、概论 海洋、水文和环境调查中,经常需要测定不同深度水体中的泥沙含量。因目前的常规光学遥感技术只能测量表层水体中的泥沙含量,所以满足这种要求的唯一途径迄今仍然是采用传统的水文学方法。这种方法需要用船只运载笨重的采水器采集不同深度的水样,然后,将大量瓶装的水样,运送回实验室进行过滤、灼烧、衡重、称重等一系列繁杂操作。对于泥沙含量较高的水体,过滤一升水样就需要十多小时。成百上千水样的过滤,耗时十分惊人。所以这种成本高、效率低的技术现状极待改善。
I. INTRODUCTION In marine, hydrological and environmental surveys, it is often necessary to determine sediment concentrations in different depths of water. Because the current conventional optical remote sensing technology can only measure the sediment content of surface water, the only way to meet this requirement is still the traditional hydrological method. This method requires ships carrying bulky water collectors to collect water samples of different depths and then transports a large number of bottled water samples back to the laboratory for filtration, burning, weighing, weighing and a series of complicated operations. For water with high sediment content, it takes more than 10 hours to filter a liter of water. Hundreds of water filtration, the time-consuming is very alarming. So this high cost, low efficiency of the technical situation is awaiting improvement.