A laboratory evaluation of the laser in situ scattering and transmissometery instrument using natural sediments
A laboratory evaluation of the laser in situ scattering and transmissometery instrument using natural sediments
复制标题
DOI：
10.1016/s0025-3227(98)00196-0
复制
发表时间：
1999-07
期刊：
影响因子：
2.9
通讯作者：
P. Traykovski;R. Latter;J. Irish
中科院分区：
文献类型：
--
作者：
P. Traykovski;R. Latter;J. Irish
LISST(激光原位散射与透射仪)是由红杉科学公司设计的，用于测量野外环境中泥沙悬浮物的粒度分布和浓度。为了了解LISST对来自不同海洋来源的天然沉积物的性能，进行了几个实验，将LISST的结果与传统的筛分、过滤和称重技术进行了比较。对于粒度为5~250φ的沉积物，如果它们之间至少相隔1μ，则LISST能够准确地定位单峰分布的峰值，并分辨出双峰分布的两个峰值。与需要沉积物粒度特定校准常数的单频散射沉积物浓度传感器不同，LISST能够针对5~250μm不同粒度分布的不同粒度分布，使用单个校准常数来精确测量沉积物浓度。
The LISST (Laser In Situ Scattering and Transmissometery) instrument was designed by Sequoia Scientific to measure the particle size distributions and concentrations of sediment suspensions in the field environment. To understand the LISST's performance with natural sediments from a variety of marine sources, several experiments were performed to compare the LISST's results to traditional sieving, filtering and weighing techniques. The LISST was able to correctly locate the peak of a unimodal particle size distribution and resolve the two peaks of a bimodal distribution if they are separated by at least 1φ for sediment sizes of 5 to 250 μm. Unlike a single frequency scattering sensor for sediment concentration, which require sediment size specific calibration constants, the LISST is able to accurately measure sediment concentration with a single calibration constant for varying size distributions within the size range of 5 to 250 μm. The LISST was also found to adequately represent the particle volumetric size distribution for two different samples from marine environments.