The hyperspectral Compact Airborne Spectrographic Imager (CASI) sensor was implemented to monitor water quality in a transitional zone from polluted to clean seawater, in Haifa Bay and adjacent river estuaries, at the northern part of the Mediterranean coast of Israel. Synoptic measurements of optical data acquired from the airborne scanner were used to map chlorophyll-a (chl-a) and suspended particulate matter (SPM) concentrations in surface waters in the study area. This airborne hyperspectral scanner was found as an expedient monitoring tool for the relatively small geographic area of the current study, as it enabled to reveal the patchy distribution, and sharp concentration changes of the mapped water characteristics.The distribution of SPM concentrations in Haifa Bay was mainly dictated by the polluted riverine inputs, with concentrations between 1 and 3 mg l-1 at its seaward border and higher by more than 1 order of magnitude at the river estuaries. The chl-a concentrations mapped and measured in this survey were unusually low (<2 μg l-1) due to a long-period intermission of anthropogenic phosphate and nitrate input to the bay. SPM and chl-a spatial distributions along the lower rivers system exhibit variations which could be plausibly explained by the hydrological structure and geochemical impacts on the riverine water sources. The correlation between SPM and some particulate heavy metal concentrations was found as a useful tool for monitoring such environmental hazardous substances. Copyright (C) 1999 Elsevier Science Ltd.
|Number of pages||11|
|Journal||Marine Pollution Bulletin|
|State||Published - Sep 1999|
Bibliographical noteFunding Information:
Authors express their gratitude to the crew of R/V Shikmona, to our pilot Mordehai Geva and to Yaron Gertner, Efrat Shoam Frider, Gerta Fienstein and Lora Izraelov for their assistance in the field and in the lab. We thank Prof. Anatoly Gitelson for his fruitful comments. This study was funded by the Israeli Ministry of Environment.
- Heavy metals
- Remote sensing
- Suspended particulate matter
ASJC Scopus subject areas
- Aquatic Science