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An approach to combining remote sensing spectral measurements with an ecosystem process model is presented. In this approach, the ecosystem model is not bound by the sole use of satellite data, but integrates the latter in an explicit formulation of the main processes of vegetation functioning. A...


Mougin, E.Seen, D. loRumbal, S.Gaston, A.Hiernaux, Pierre H.Y.[A regional sahelian grassland model to be coupled with multispectral satellite data. I. Model description and validation]A regional sahelian grassland model to be coupled with multispectral satellite data. I. Model description and validation

This article presents an analysis of ERS-1 wind-scatterometer (WSC) data acquired over a region located in the northern Sahel. The considered period extends from January 1992 to December 1995, that is, covering four vegetation cycles. Experimental observations show that WSC responses at 45° of i...


Frison, P.L.Mougin, E.Hiernaux, Pierre H.Y.[Observations and interpretation of seasonal ERS-1 wind scatterometer data over northern Sahel (Mali)]Observations and interpretation of seasonal ERS-1 wind scatterometer data over northern Sahel (Mali)

ERS wind scatterometer (WSC) and SSNI/I data are compared for monitoring the seasonal variation of herbaceous vegetation over a sahelian region. Temporal evolution of polarization difference brightness temperatures derived from SSM/I data and WSC backscattering coefficient acquired at 45° of inci...


Frison, P.L.Mougin, E.Jarlan, L.Karam, M.A.Hiernaux, Pierre H.Y.[Comparison of ERS wind-scatterometer and SSM/I data for Sahelian vegetation monitoring]Comparison of ERS wind-scatterometer and SSM/I data for Sahelian vegetation monitoring

Predictions of tree size and density from a remote sensing model were used together with allometric regression equations from the literature to estimate foliage and above-ground woody biomass in sparse woodlands. Study sites with woody cover ranging from 10-50 per cent were located in the Sudania...


Franklin, J.Hiernaux, Pierre H.Y.[Estimating foliage and woody biomass in Sahelian and Sudanian woodlands using a remote sensing model]Estimating foliage and woody biomass in Sahelian and Sudanian woodlands using a remote sensing model

Presents and discusses the results of a 3 year experiment carried - in the Niger flood plains of central Mali - to compare the effects of burning with cutting, grazing & complete exclosure. Makes suggestions for improved burning practices for range management.


Hiernaux, Pierre H.Y.Diarra, L.[Savanna burning, a controversial technique for rangeland management in the Niger flood plains of central Mali]Savanna burning, a controversial technique for rangeland management in the Niger flood plains of central Mali

In this chapter, it is argued that the application of scientific knowledge is an essential prerequisite for sustainable resource management. Scientific inputs have the following components when applied to a specific region: (1) a through analysis of the resource base, with emphasis on feed and wa...


Leeuw, P.N. deDiarra, L.Hiernaux, Pierre H.Y.[An analysis of feed demand and supply for pastoral livestock: the Gourma region of Mali]An analysis of feed demand and supply for pastoral livestock: the Gourma region of Mali

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