Multilateral Working Group on Water Resources
Water Data Banks Project
Entry from Directory of Selected Israeli Water-related Publications
| NOTE: It is recommend that all information posted here be checked with primary sources before use. |
| TITLE: | A spatial, time-dependent approach to estimation of hydrologic data. In: Journal of Hydrology, 135 (1992) 133-142 |
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| AUTHORS: | B. Berkowitz, M. Ben-Zvi, J. Berkowitz |
| PUBLISHER: | Elsevier Science Publishers B.V. |
| PAGES: | 10 |
| PUBLICATION DATE: | July 1992 |
| LANGUAGE OF PUBLICATION: | English |
| ABSTRACT: | Procedures for analysis of data from a hydrologic network usually assume that a collection schedule is fully followed. In practice, however, data are frequently missing (or simply unknown, in regions where measurements were not planned), and must be estimated on the basis of other available obsand information. During the 1980s a simple method to estimate missing data (e.g. on water levels) by use of a spatial approach was developed. Spatial and temporal variations of a measurable state variable (such as hydraulic head) were assumed to be described by a deterministic function, with randomness introduced by the choice of location and timing of observations. The function describes a spatial surface, and allows only for fluctuation parallel to itself along the time axis. Missing (or unknown) data can then be estimated from predicted surfaces. The constraint of parallel fluctuations has now been removed. The proposed method, which is more general, is based on integration of two sources of information: prior estimates and online estimates. It allows for continuous updating of the function as additional information becomes available, and as a consequence, missing (or unknown) data can be more accurately estimated. |
| ADDRESS FROM WHICH THE PUBLICATION CAN BE OBTAINED: | Elsevier Science Publishers, Journal Department, P.O.Box 211 1000 AE, Amsterdam, Netherlands |
| AVAILABILITY: | By order from the publisher |
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