Trophic state analysis of inland lakes

Wezernak, C. T.; Tanis, F.J.; Bajza, C.A.

doi:10.1016/0034-4257(76)90045-6

Cited by 23 publications

(11 citation statements)

References 4 publications

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“…Lathrop and Lillesand,[47] also found significant correlations of SPOT-1 Multispectral data with the same water quality parameters, with the exception of temperature, not measured by the SPOT-1 system. Both Lillesand et al [49], using Landsat Multispectral Scanner data, and Wezernak et al, [93], using low altitude mulispectral scanner data, determined that remotely sensed data could be used to effectively predict the trophic status of inland water bodies.…”

Section: Ch Ha An Ng Ge E D De Et Te Ec Ct Ti Io On Nmentioning

confidence: 99%

Geographic Information Systems (Gis) and Remote Sensing in the Management of Shallow Tropical Lakes

Mironga¹

2004

Appl Ecol Env Res

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A Ab bs st tr ra ac ct t. . This paper reviews applications of remote sensing and geographic information systems (GIS) techniques to the assessment of tropical waters. These applications are discussed in the context of specific management objectives and sensors used. The need to monitor the spreading patterns of weeds in the tropical waters, land-use changes in the areas surrounding them, change detection, disappearance of wetlands, productivity and nutrient status, in order to establish trends and subsequently develop predictive models to facilitate effective management, is highlighted. GIS capability can be used to link ecological information with the management decisions of these waters. Remote sensing provides useful information in the form of satellite images and aerial photographs that can be integrated and analyzed in a GIS to provide useful spatial information and temporal changes over large geographic areas affecting the structure and function of tropical waters. K Ke ey yw wo or rd ds s: : GIS, remote sensing, sustainable management I In nt tr ro od du uc ct ti io on n Shallow tropical waters play a vital role in many people's lives and contain remarkable communities of plants and animals. Shallow tropical waters are profoundly affected by their locality and by changes taking place on land, even at great distances from them. They are often faced with a number of threats as a result of socio-economic activities, taking place within them and their catchments. Rapid population growth in catchment zones has resulted in intensive use of land for farming, deforestation and growth of urban centers. Consequently, there is accelerated runoff leading to increased silt and nutrients discharge into the shallow tropical waters.Currently most tropical lakes are being choked by water hyacinth (Eichhornia crassipes), which continues to cause severe hardship and immense economic difficulties to most countries. The pressure on tropical waters from the weed requires intensive research in order to come up with useful suggestions towards their management. It is at this level that availability of automated, real time data becomes imperative. Remote sensing has developed rapidly to address these needs. The advantage of remote sensing as documented by Richards [64] and Sabins [69] is its ability to capture and record land details instantaneously. Its spatial resolution and aerial coverage provide the researcher with a synoptic view of a land surface. Such data derived from remotely sensed images may be stored efficiently and analysed effectively in a GIS (Risser and Treworgy,[67]).

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Section: Ch Ha An Ng Ge E D De Et Te Ec Ct Ti Io On Nmentioning

confidence: 99%

Geographic Information Systems (Gis) and Remote Sensing in the Management of Shallow Tropical Lakes

Mironga¹

2004

Appl Ecol Env Res

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“…Defining the boundaries in absolute terms also depends on the parameters selected for measurement. There is no scientific consensus on what standards or values of these and other variables constitute a given trophic state (Wezernak et al, 1976). For the Norfolk Broads the following divisions are suggested (Table 1) (Moss, personal comm.…”

Section: Conventional Trophic Classification Applied To the Broadsmentioning

confidence: 99%

“…Suspended solids and Secchi depth (an increase in suspended solids will lead to a decrease in Secchi depth) will be associated with an increase in the reflected energy, and the peak of reflectance will move towards the longer wavelengths (Lillesand & Kiefer, 1994). These changes are measurable by remote sensing techniques and could provide the basic information for eutrophication assessment (Clarke et al, 1970;Wezernak et al, 1976;Baban, 1993Baban, , 1994.…”

Section: Introductionmentioning

confidence: 99%

Trophic classification and ecosystem checking of lakes using remotely sensed information

Baban

1996

Hydrological Sciences Journal

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Both the conventional and the Carlson trophic state index (TSI) classification methods were employed to assess the eutrophication state of 26 lakes in the Norfolk Broads, UK. The parameters employed were: Secchi depth, chlorophyll a and total phosphorous which had been obtained previously by using Landsat TM imagery, ground reference data and empirical algorithms for the Norfolk Broads (Baban, 1993). The conventional method did not provide sufficient differentiation between the Broads. The Carlson TSI provided sufficient information to differentiate between all 26 Broads. Consequently, using the Carlson TSI information, these Broads were classified into three groups. The classification was based on the relationship between the calculated Carlson TSI of the external phosphorous loading and its influence on the eutrophication process as deduced from the calculated TSI values for the other two parameters. The results were consistent with all the available knowledge and experience concerning these Broads and demonstrated the potential of combining remote sensing techniques and Carlson TSI in eutrophication assessment, ecosystem checking and watershed analysis.

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“…MSS data are useful in monitoring and classifying lake trophic status (Boland 1974;Wezernak, Tanis & Bajza 1976;Ramsey, Jensen, Mackey & Gladden 1992). MSS data are useful in monitoring and classifying lake trophic status (Boland 1974;Wezernak, Tanis & Bajza 1976;Ramsey, Jensen, Mackey & Gladden 1992).…”

Section: Films and Sensorsmentioning

confidence: 99%

Monitoring water quality for tropical freshwater fisheries and aquaculture: a review of aircraft and satellite imagery applications

Egna

1994

Fisheries Management Eco

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Water quality in tropical fish ponds is generally evaluated without the assistance of remote sensing because of cost, cloud cover, and other constraints, but certain parameters such as suspended solid concentrations, colour, chlorophyll and temperature can effectively be monitored by aerial photography and satellite imagery. This paper reviews applications of remote sensing to tropical inland fisheries and aquaculture and includes applications from related disciplines. A brief assessment of new platforms and sensors is also presented. Remote sensing images may help to inform researchers and planners about water quality trends that are occurring over a broad area in which fisheries and aquaculture activities occur. However, the operational use of remote sensing in aquaculture remains largely experimental.

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Trophic state analysis of inland lakes

Cited by 23 publications

References 4 publications

Geographic Information Systems (Gis) and Remote Sensing in the Management of Shallow Tropical Lakes

Geographic Information Systems (Gis) and Remote Sensing in the Management of Shallow Tropical Lakes

Trophic classification and ecosystem checking of lakes using remotely sensed information

Monitoring water quality for tropical freshwater fisheries and aquaculture: a review of aircraft and satellite imagery applications

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