摘要
在水文、海洋、环境和生态调查研究中,需要一种可以对不同深度水体中的叶绿素浓度进行遥测的新方法。传统的光学和光学遥感技术迄今难以实现这种要求。本文提出了一种可满足这种要求的精密遥测新技术,以及专门为此而设计的SSCD装置。水体中不同深度处的水样可用小型水泵抽入SSCD装置内,然后用轻便光谱辐射计遥测其叶绿素浓度。一次遥测仅需4min左右。从对29个鱼塘的叶绿素浓度进行现场遥测的结果来看,这种方法的平均相对误差只有3.8％。与传统的分光光度法、荧光分光光度法和色谱法相比,本方法的最大优点是无需采集水样,样品也无需预处理,测量效率可提高几十倍,很有推广价值。
In hydrological, oceanographic, environmental and ecological investigations, there is usually a great demand for a new technique to remotely detect chlorophyll concentration (CC) in different water depths. However, the conventional optical methods and optical remote sensing techniques can not meet the demand. This paper describes a new technique which can remotely detect CC in different water depths and a suspended solids concentration determination (SSCD) device specially designed for this purpose. The water samples from different depths of water can be pumped into the SSCD device, then their CC were remotely detected by a portable spectroradiometer. It only took about four minutes to finish one CC remote detection. The new technique is dozens of times more efficient than the traditional spectropho-tometric, fluorometric and chromatographic methods. The results of in-situ CC remote detection of 29 fishponds showed that the average relative error of the new method was only 3.8%. Since the new technique has great advantages such as low cost, high efficiency and no need of sample collection and sample pretreatment, to which all the conventional methods are im-. comparable, it is well worth extending it into hydrological, oceanographic and environmental investigations.
出处
《环境遥感》
CSCD
1989年第2期136-143,共8页
