Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

Damen, M. C. J.

Bibliographic data

Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856343064

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: XV, 547 Seiten

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856343064

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(26,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Damen, M. C. J.

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: 4 Renewable resources in rural areas: Vegetation, forestry, agriculture, soil survey, land and water use. Chairman: J. Besenicar, Liaisons: M. Molenaar, Th. A. de Boer

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Land use along the Tana River, Kenya - A study with small format aerial photography and microlight aircraft. R. Beck, S. W. Taiti, D. C. P. Thalen

Document type:: Multivolume work

Structure type:: Chapter

Symposium on Remote Sensing for Resources Development and Environmental Management / Enschede / August 1986 375 Land use along the Tana River, Kenya - A study with small format aerial photography and microlight aircraft R. Beck DHV Consulting Engineers, Netherlands S. W.Taiti Land systems and land use Consultant, Kenya D.C.P.Thalen Research Institute for Nature Management, Netherlands ABSTRACT: The study executed in 1984 and 1985 for the Netherlands Ministry of Education and Science, had as one of its objectives to monitor land use on the riverine lands along the Lower Tana River in Kenya. Monitoring was undertaken with a microlight aircraft equipped with small format cameras. A variety of land utilization types was identified and located for the different parts of the floodplains and surrounding lands. These land utilizations types are based on the association of land use practices, ethnic identities, ecological entities, etc. wich coincide at locations with certain environmental conditions, of which the flooding regime of the Tana River is a dominant factor. The use of the microlight aircraft proved to be of great value during the surveys. Its use contributed greatly to the completeness of the study in the very inaccessible area. The photographs were flown over preselected areas, or randomly distributed areas met during the photoflights. The photograps were produced in runs with forward and sideward overlap, enabling rotonly stereoscopic analysis, but even their use in photoblocks. RESUME: L'étude exécutée de 1984 à 1985 par le compte du ministère neérlandais del'Education et des a Sciences avait comme un des objectifs le monitoring de l'utilisation des francbords du fleuve Tana. Kenya. Le monitoring est exécuté avec l'aide d'un avion u.l.m. équipé aves des caméras à petit format. Un nombre de spectres d'utilisation des terres étaient identifiés et localisés pour les différentes sections des francbords du fleuve et ses environs. Ces spectres d'utilisation des terres sont basés sur les techniques et cultures de l'agronomie, l'élevage, les identités éthniques et les entités écologiques. Les spectres coïncident sur des locations avec des conditions physiques spécifiques, dans lesquelles le régime d'inondation du fleuve Tana est un facteur dominant. L'utilisation de l'avion u.l.m. a rendu beaucoup de résultats pour l'étude sur un terrain inaccessible. La photographie aérienne est réalisée pour des terrains sélectionnés avant ou pendant les vols. Les photos sont produites en photoruns avec un recouvrement partiel, permettant l'analyse stéréroscopique, ou même en photoblocks. 1. Introduction 1.1 The Tana River Remote Sensing Study The Tana River Remote Sensing Study (TRRSS) was exe cuted in 1984 and 1985 by DHV Consulting Engineers in cooperation with the Delft Hydraulics Laboratory, the Institute for Nature Management all from the Nether lands together with Landevco from Kenya. The study, financed by the Dutch Ministry of Educa tion and Science, was carried out in conjunction with the Tana River Morphology Study (TRMS) in which the same organizations participate and which is carried out for the Tana and Athi River Development Authority.This TRMS is carried out with the objective to analyze the effect of current and future interven tions, such as reservoirs for power generation, irri gation schemes and bridges on the morphology of the river and the riverine lands. The TRRSS had the objective to test innovative remote sensing methods on certain specific research areas in the context of an operational project, the TRMS. Apart from this methodological objective, the results of the TRRSS are of course of great interest to the TRMS. Data collection with respect to the selected research areas would involve huge means in terms of logistics and manpower when no use would be made of remote sensing techniques. 1.2 Environmental setting The Tana River is the largest perennial river in Kenya and its most important surface water resource. It rises from both Mount Kenya and the Nyandarua ranges in Central Kenya and enters the indian Ocean between the towns of Lamu and Malindi.The catchment area of over 100,000 km2 covers approx. 20% of the Kenyan territory. The lower Tana River, the subject of the present studies covers the alluvial downstream half of the river course (625 km.), as well as the riverine lands along the river. These riverine lands are in fact floodplains, which start at the beginning of the study area and reach to the sea, where the Tana Delta covers an area of some 3000 km2. In Figure 1 the upper part of the study area is presented as viewed by Landsat . These floodplains consist physiographically of two units, the levees and the river basin lands. However, the climate and hydrological characteristics as flow velocity and frequency and duration of inundations result in a totally different landscapes, natural vegetation and land use in different parts of the floodplains. The mean annual rainfall in Tana Delta exceeds 900 mm, the northern parts of the study area have a semi- arid climate with less than 300 mm/year of rainfall spread over two rainy seasons. Largely under direction of the Tana and Athi Rivers Development Authority, the national policy concerning the Lower Tana River has changed abruptly in recent years, the main reason being concern for Kenya's energy and food supply and the realization of the irrigation potential of the Lower Tana River where 200,000 ha of land are regarded as potentially suita-

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