Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Sols --- Waterlogging (Soils) --- Saturation en eau.

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Mosaiques d'images --- Validation radiometrique --- Radiométrie. --- Couleurs. --- Saturation optique.

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Groundwater --- Eaux souterraines. --- Spoil banks --- Terrils. --- Hydric soils --- Sols --- Saturation en eau.

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

The South African Taxonomic soil classification system (SAT) is well established and utilised in South Africa. However, it is not internationally well known and therefore the need arose to provide a tool by which South African soil taxonomists can convert South African soil classifications and profile descriptions to the international classifications of the World Reference Base (WRB) for soil resources. The diagnostics and tacit knowledge presented in this publication are therefore based on the SAT and the WRB. When necessary, further substantiation was derived from the Land Type Survey of South Africa. The adopted procedure is effective in providing a reasonable classification based on the South African soil forms and families, while excluding certain WRB soil groups and qualifiers, because these are irrelevant to South African taxonomy. Lastly, this publication also highlights some peculiarities, omissions and inconsistencies observed between the SAT and WRB.

Soil science, sedimentology --- World Reference Base (WRB) --- USDA Soil Taxonomy --- soil classification systems --- diagnostic horizons --- dystrophic --- mesotrophic --- eutrophic --- organic O horizon --- base saturation --- South African soil taxonomy

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

L’étude traite de l’augmentation de la population wallonne, l'étalement urbain, la consommation excessive d'espaces en Wallonie et l’épuisement des réserves foncières en zone d'habitat. L’échelle d’étude est le niveau communal.
L’étude vise, d’une part, à présenter les critères qui expliquent la croissance de population à l’échelle communale et, d’autre part, notre problématique concernant l’impact des autorités communales sur leur développement démographique, compte tenu de leur contexte et perspectives locales.
La démarche méthodologique propose une double analyse. Une démarche quantitative cherche d’abord à modéliser, par régression multiple, quelles variables incitent les habitants à s'installer dans une commune. Trois facteurs principaux y sont étudiés : la proximité aux pôles urbains principaux et aux frontières wallonnes, le prix de l’immobilier et la disponibilité foncière sur le territoire communal. Une démarche qualitative présente l’étude de cas de quatre communes aux évolutions démographiques observées atypiques : Perwez, Lasne, Aubange et La Roche-en-Ardenne.
Les résultats montrent que les variables étudiées les plus significatives sont : le temps de trajets de la commune à Bruxelles et à Luxembourg-Ville, le prix médian d’un terrain à bâtir vendu et le taux d’offre foncière potentielle en zone d’habitat dans la commune.
La conclusion montre que l’impact des autorités politiques communales n’explique qu’en partie le développement démographique de la commune, car ce dernier dépend avant tout des décisions et tendances démographiques régionales et est fortement influencé par la localisation géographique de la commune. The study deals with the Walloon population growth, the urban sprawl, the overuse of spaces in Wallonia and the depletion of land reserves in housing areas. It focuses on the municipal level.
The survey aims to present, on the one hand, the criteria explaining the population growth at the municipal level and, on the other hand, a set of questions about the impact of the council authorities’ decisions on their own demographic development, taking into account local context and perspectives.
The methodological approach proposes a double analysis. First, a quantitative approach seeks to model, by multiple regression, which variables encourage residents to settle in the municipality. Three main factors are studied here : the proximity to the main urban centres and the Walloon borders, the price of real estate and the land availability in the commune. Then, a qualitative approach presents the case study of four municipalities – Perwez, Lasne, Aubange and La Roche-en-Ardenne – with observed atypical demographic evolutions.
The survey reveals that the most significant studied variables are the travel time to Brussels and Luxembourg-City, the median price of a sold building land and the rate of potential land supply in the housing area in the municipality.
The conclusion is that the impact of the municipal political authorities only partly explains the demographic development of the municipality, because it depends essentially on regional demographic trends and decisions and is strongly influenced by the geographical location of the municipality.

croissance démographique --- projection démographique --- développement résidentiel --- urbanisation --- logement --- saturation urbaine --- périurbanisation --- étalement urbain --- Wallonie --- pouvoirs publics --- entité administrative communale --- population growth --- demographic projection --- residential development --- urbanization --- housing --- urban saturation --- suburbanization --- urban sprawl --- Wallonia --- public authorities --- municipal administrative entity --- Sciences sociales & comportementales, psychologie > Géographie humaine & démographie