Identification of the parameters describing primary production from continuous oxygen signals

被引:9
作者
Aalderink, RH
Jovin, J
机构
关键词
dissolved oxygen; Fisher information matrix; joint confidence regions; parameter correlation; parameter estimation; photosynthesis vs. irradiance curve;
D O I
10.2166/wst.1997.0161
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The parameters of a simple dissolved oxygen (DO) model have been estimated on a day to day basis from continuous oxygen measurements. Oxygen was measured in a shallow ditch (0.38 m) dominated by bentic algae. The main objective was to study the identifiability of the parameters P-max and I-opt in the photosynthesis vs. irradiance (P/I) curve, in order to determine the seasonal variations of the parameters and to study relationships with environmental conditions. For this purpose joint parameter confidence regions, parameter correlation, and the eigenvalues of the Fisher information matrix have been determined. The results show that P-max can be estimated fairly well, whereas for I-opt the confidence regions are much larger. In particular for days in winter and spring extremely long elongated confidence regions can be found. However, it can be concluded that for a sufficient number of days, both parameters in the PII curve can be estimated sufficiently accurately to study seasonable variability and dependency with temperature and light conditions. (C) 1997 IAWQ. Published by Elsevier Science Ltd.
引用
收藏
页码:43 / 51
页数:9
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