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International Institute for Aerospace Survey, Netherlands (2002)

Spatial water quality monitoring and assessment in Malewa river and Lake Naivasha Kenya

Munoz Villers Lyssette, Elena

Titre : Spatial water quality monitoring and assessment in Malewa river and Lake Naivasha Kenya

Auteur : Munoz Villers Lyssette, Elena

Etablissement de soutenance : International Institute for Aerospace Survey, Netherlands

Grade : Master of Science (MSc) 2002

Résumé
The research was conducted to examine the status and effects of economic activities - mainly flower growing, dairy farming and water supply on Lake Naivasha water quality and main inflowing rivers. The water quality evaluation for drinking water and irrigation purposes of the rivers and lake, was based on WHO (1993) and FAO #29 (1985) guidelines. Two different spatial sampling schemes were carried out in Lake Naivasha ; a high density distributed and a line transect sampling. Geostatistical techniques were used to estimate the spatial variability of pH, temperature, conductivity, total dissolved solids and dissolved oxygen from data collected in the first survey. The use of line transect survey data for deriving water quality maps was investigated. However, this survey method did not permit a full spatial assessment of the lake water quality water variables, but only in combination with information (e.g. variograms) from the first survey. The temporal comparison of the two spatial datasets permitted to observe and quantify the effects of river inflows in the lake. The refreshening of the lake waters with rainfall-based runoff using the BC parameter was analyzed and the contaminants inflow was observed using the N, P nutrient variables.

Sujets : Lake Naivasha, Kenya ; Economics ; Horticulture ; Water ; Pollution ; Malewa River, Kenya ;

Présentation

Page publiée le 23 janvier 2017, mise à jour le 17 octobre 2018