Biological Assessment of the Water Quality in South‐Holland (The Netherlands)

Abstract

A hydrobiological study was carried out to elaborate the water quality classification system of CASPERS t KARBE (1966KARBE ( , 1967 for the larger stagnant bodies of water in the western part of the n'etherlands. Significant correlations have been established between different physical and chemical parameters and phytoplankton community structures such as diversity and saprobity. From this a proposill is developed t o quantify the water quality classes in CASPERS t KARBE'S scheme on parameters measuring the bioactivity, oxygen regime and phytoplankton community structure. The scheme is now incorporated in the practical water quality assessment in North-and SouthHolland both for routine monitoring as well as for special water quality studies.

Limnology of a conserved man-made lake in Bangladesh. I. Physical and chemical factors

“…The average SRP concentration in the lake was 10.52 μg/l. SRP concentration reported for some eutrophic lakes of other regions, namely Suraha lake (16) , reservoir and lakes of south Holland (17) are 60, 90 and 500 μg/l, respectively. Compared to these water bodies the SRP concentration is much lower.…”

Comparision of historical and recent data on hydrochemistry and phytoplankton in the Rijnland area (The Netherlands)

“…, 1967. Only with respect to some species, e. g. Lynbya limnetica, Phormidium mucicola, Nitzschia romana, Skeletonema potamos it might be possible that discrepancies between 1941/1942 and 1986/1987 are due to differences in conception of two researchers, since these species might have been overlooked or identified as others species (Klapwijk, 1988). The saprobic grade according to Pantle & Buck (1955) did not change during the last decades.…”

“…To calculate the saprobic degree according to Pantle & Buck (1955), the old and recent estimates (rr, r, +, c, cc, ccc) were translated into a scale (1,2,3,5,7,9) according to Sladecek (1973). The saprobic valencies of various phytoplankton species given by Slidecek (1973) and Mauch (1976) are used here, while the saprobic valencies of some dominant blue-green algae have been adjusted to Klapwijk (1988).…”