| Titre : |
Sahel-Sudano Désertification study |
| Type de document : |
texte imprimé |
| Auteurs : |
Worcester, B. K. ; Dalsted, K. J. ; Moore, D. G. |
| Mention d'édition : |
Departement of State Agency for International Developpement |
| Editeur : |
Departement of State Agency for International Developpement |
| Année de publication : |
1978 |
| ISBN/ISSN/EAN : |
CI-00313 |
| Note générale : |
This stydy was initiated to evaluate the usefulness of landsat data for monitoring the effects of desertication on arid and semi-arid lands. A stydy area was selected which encompases parts of Mauritanie, Mali and Senegal. This is an area where evapotranspiration exceeds precipitation annually. It is therefore very susceptible to indicatirs of short, intermediate and long term desertication effects are illustrated and discussed. Short term effects are shown in a very fragile area where vegetation is evident during a higher precipitation year, 1976, but not during drier hears, 1972 and 1977. This amount of water in stream and river channels is illustred as a short term indicator. The extent of flooding in flood recession agriculture ares is also visualized... |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Sahel Desertification Climat Vertisol Agriculture Ecologie Teledetection Aridisol Oxisols Entisols |
| Index. décimale : |
577 Ecologie |
| Résumé : |
This stydy was initiated to evaluate the usefulness of landsat data for monitoring the effects of desertication on arid and semi-arid lands. A stydy area was selected which encompases parts of Mauritanie, Mali and Senegal. This is an area where evapotranspiration exceeds precipitation annually. It is therefore very susceptible to indicatirs of short, intermediate and long term desertication effects are illustrated and discussed. Short term effects are shown in a very fragile area where vegetation is evident during a higher precipitation year, 1976, but not during drier hears, 1972 and 1977. This amount of water in stream and river channels is illustred as a short term indicator. The extent of flooding in flood recession agriculture ares is also visualized... |
| Note de contenu : |
This stydy was initiated to evaluate the usefulness of landsat data for monitoring the effects of desertication on arid and semi-arid lands. A stydy area was selected which encompases parts of Mauritanie, Mali and Senegal. This is an area where evapotranspiration exceeds precipitation annually. It is therefore very susceptible to indicatirs of short, intermediate and long term desertication effects are illustrated and discussed. Short term effects are shown in a very fragile area where vegetation is evident during a higher precipitation year, 1976, but not during drier hears, 1972 and 1977. This amount of water in stream and river channels is illustred as a short term indicator. The extent of flooding in flood recession agriculture ares is also visualized... |
Sahel-Sudano Désertification study [texte imprimé] / Worcester, B. K. ; Dalsted, K. J. ; Moore, D. G. . - Departement of State Agency for International Developpement . - Departement of State Agency for International Developpement, 1978. ISSN : CI-00313 This stydy was initiated to evaluate the usefulness of landsat data for monitoring the effects of desertication on arid and semi-arid lands. A stydy area was selected which encompases parts of Mauritanie, Mali and Senegal. This is an area where evapotranspiration exceeds precipitation annually. It is therefore very susceptible to indicatirs of short, intermediate and long term desertication effects are illustrated and discussed. Short term effects are shown in a very fragile area where vegetation is evident during a higher precipitation year, 1976, but not during drier hears, 1972 and 1977. This amount of water in stream and river channels is illustred as a short term indicator. The extent of flooding in flood recession agriculture ares is also visualized... Langues : Anglais ( eng)
| Mots-clés : |
Sahel Desertification Climat Vertisol Agriculture Ecologie Teledetection Aridisol Oxisols Entisols |
| Index. décimale : |
577 Ecologie |
| Résumé : |
This stydy was initiated to evaluate the usefulness of landsat data for monitoring the effects of desertication on arid and semi-arid lands. A stydy area was selected which encompases parts of Mauritanie, Mali and Senegal. This is an area where evapotranspiration exceeds precipitation annually. It is therefore very susceptible to indicatirs of short, intermediate and long term desertication effects are illustrated and discussed. Short term effects are shown in a very fragile area where vegetation is evident during a higher precipitation year, 1976, but not during drier hears, 1972 and 1977. This amount of water in stream and river channels is illustred as a short term indicator. The extent of flooding in flood recession agriculture ares is also visualized... |
| Note de contenu : |
This stydy was initiated to evaluate the usefulness of landsat data for monitoring the effects of desertication on arid and semi-arid lands. A stydy area was selected which encompases parts of Mauritanie, Mali and Senegal. This is an area where evapotranspiration exceeds precipitation annually. It is therefore very susceptible to indicatirs of short, intermediate and long term desertication effects are illustrated and discussed. Short term effects are shown in a very fragile area where vegetation is evident during a higher precipitation year, 1976, but not during drier hears, 1972 and 1977. This amount of water in stream and river channels is illustred as a short term indicator. The extent of flooding in flood recession agriculture ares is also visualized... |
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