Vlaams Instituut voor de Zee

Platform voor marien onderzoek

In:

Open Marien Archief

Het Open Marien Archief van België (OMA) biedt vrije toegang tot de digitale publicaties over de Vlaamse kust en het Belgisch deel van de Noordzee, en alle andere mariene, estuariene en kustgebonden publicaties van Belgische auteurs en wetenschappers en van buitenlandse wetenschappers geaffilieerd aan een Belgische instelling.

Meer info

Nieuwe zoekopdracht
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print-vriendelijke versie

Toward a generic method for studying water renewal, with application to the epilimnion of Lake Tanganyika
Gourgue, O.; Deleersnijder, E.; White, L. (2007). Toward a generic method for studying water renewal, with application to the epilimnion of Lake Tanganyika. Est., Coast. and Shelf Sci. 74(4): 628-640. dx.doi.org/10.1016/j.ecss.2007.05.009
In: Estuarine, Coastal and Shelf Science. Academic Press: New York. ISSN 0272-7714, meer
Peer reviewed article

Beschikbaar in Auteurs 

Trefwoorden
    Eindige-elementenmethode; Epilimnion; Leeftijd; Verblijftijd; Vernieuwing; Africa, Tanganyika L. [Marine Regions]; Marien; Brak water; Zoet water
Author keywords
    water renewal; age; residence time; Lake Tanganyika; reduced-gravity model; finite elements

Auteurs  Top 

Abstract
    We present a method, based on the concept of age and residence time, to study the water renewal in a semi-enclosed domain. We split the water of this domain into different water types. The initial water is the water initially present in the semi-enclosed domain. The renewing water is defined as the water entering the domain of interest. Several renewing water types may be considered depending on their origin. We present the equations for computing the age and the residence time of a certain water type. These timescales are of use to understand the rate at which the water renewal takes place. Computing these timescales can be achieved at an acceptable extra computer cost. The above-mentioned method is applied to study the renewal of epilimnion (i.e. the surface layer) water in Lake Tanganyika. We have built a finite element reduced-gravity model modified to take into account the water exchange between the epilimnion and the hypolimnion (i.e. the bottom layer), the water supply from precipitation and incoming rivers, and the water loss from evaporation and the only outgoing river. With our water renewal diagnoses, we show that the only significant process in the renewal of epilimnion water in Lake Tanganyika is the water exchange between the epilimnion and the hypolimnion, other phenomena being negligible.

 Top | Auteurs