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:: Field experience with different types of remote-sensing data in a small-scale soil and land resource survey in southern Tanzania. T. Christiansen

Document type:: Multivolume work

Structure type:: Chapter

. For. Res. Symposium on Remote Sensing for Resources Development and Environmental Management / Enschede / August 1986 t Interpreta- g von Fichte JLlgem. Forst Dwarfmistle- tains of New Aspects of g of actual ng und Luft- ihre Erfas- n, E. and G. irben wissen. pp. 97-111. tigations to onditions of r irginia Agr. he spruce in )gy Bull. 28, )ocumentation 1. J. Forest Acid deposi- nd Tech. 17: ruce budworms USDA Forest stry Service tatus of the and Tennes- v. State and -1-1, 12 pp. tates trees, . USDA Misc. sel zur Aus- mr die Wald- Lts 39:1093- en, and W.M. if red spruce , Forest Pest i, Fort Col- worth. 1985. • forests of —Mt. Rogers >untains and l Appalachian :t, 67 pp. [ahrer. 1981. iterpretation L.) auf mit- len. Memoirs- Forsliche .and 57:433- lmann. 1982. Mountains of .09:162-168. 1966. Aerial lg damage by est Service, Exp. Sta., , M. Miller- ative survey ind mortality lire - 1984. a, NA-TP-11, italitat des s Bundesins- 80 pp. plus Field experience with different types of remote-sensing data in a small-scale soil and land resource survey in southern Tanzania T.Christiansen Agrar- und Hydrotechnik GmbH, Essen, FR Germany ABSTRACT: During a small-scale agro-ecological land resource and soil survey for the Iringa Region in south ern Tanzania the advantages and imperfections of black & white panchromatic aerial photographs and two types of Landsat MSS imagery (standard false-colour composites, colour-enhanced imagery) were examined. Both types of satellite imagery turned out to be of little use in areas with high rainfall (900 - 1600 mm) and a dense vegetation cover, but they gave very good information in drier parts of the survey area (550 - 900 mm). The aerial photographs contributed little information on the flat parts of the drier areas. They were most useful in an intermediate zone with complex relief. Colour interpretation keys for the satellite imagery of selected areas were compiled. The results indicate that the validity of such keys is generally limited to relatively small, agro-climatically homogeneous areas. RESUME: Au cours d'une étude à petite échelle portant sur les sols et les ressources agro-écologiques de la Région d'Iringa dans le Sud de la Tanzanie, ont été comparés les avantages et inconvénients respectifs de photographies aériennes panchromatiques noir et blanc et de deux types d'images-satellite Landsat MSS (compo sitions colorées, l'une avec fausses couleurs standard et l'autre avec accentuation des couleurs). Les deux types d'images-satellite se sont révélés être peu utiles dans les zones à pluviométrie élevée (900 - 1600 mm) et à dense couverture végétale, mais par contre ont apporté beaucoup d'informations dans les zones plus sèches (550 - 900 mm). Les photographies aériennes n'ont livré que peu d'informations dans les zones sèches à relief très aplani. Par contre, elles ont été d'un grand intérêt dans une zone modérément humide à relief complexe. Des clés d'interprétation des couleurs des deux types d'images-satellite ont été élaborées pour deux zones sélectionnées. Il en ressort que la validité de telles clés d'interprétation est généralement res treinte à des zones peu étendues et agro-écologiquement homogènes. 1. INTRODUCTION For a long time soil surveyors have successfully been utilizing remote sensing data for small-scale soil and land resource surveys. A considerable num ber of publications already exist about the appli cation of aerial photographs and satellite imagery for this type of mapping (Allan 1978, Carrol 1984, Goosen 1967, Hilwig 1982, Mathews et al. 1973, Nieuwenhuis 1978, Siegal and Goetz 1977, Thompson et al. 1984, van Sleen 1983, Westin and Frazee 1976). Relatively little, however, is published about the question of how different types of remote sens ing data stand the test in daily routine work and what their respective advantages and shortcomings are in different climatic and physiographic areas. During a small-scale survey of a large area in southern Tanzania some interesting field experience was gained which might help to reduce this informa tion gap. 2. THE SURVEY AREA The survey area is located in the southwest of Tanzania. It comprises the Iringa Region except from the Ruaha National Park in the northwest and the Eastern Forest Reserve in the northeast of the region. The area totals about 46,000 sq km (by com parison: Switzerland 41,288 sq km). The area includes strongly different altitude le vels, landscapes and climates. It ranges from hot semi-arid savanna areas with Acacia-thornbush vege tation at 500 metres altitude up to warm -températe tropical highlands with tea plantations and alti tudes of almost 3,000 metres. For African standards the area is comparatively densely populated. The soils of the survey area vary from saline dark and red loams and dark cracking clays at the lower elevations up to very leached red and yellow clays at the higher altitudes. In some areas soils have developed from volcanic ash deposits. 3. THE SURVEY: BACKGROUND, TASKS AND WORKING CONDI TIONS A land resource map (scale 1:250,000) and a soil map (scale 1:100,000) had to be produced within the frame of a regional agricultural development plan for the Iringa Region. The survey had to be carried out under typical consulting conditions, i.e. very tight schedule, almost no preparation time and li mited base information. The most important survey details are summarized in the following table. Table 1. Survey Details Land Resource Survey Soil Survey Total time available (man-months) 6 19 Fieldwork time (man-months) 3 12 Number of surveyors 2 3 Observation density no specific. 1/1000 ha Survey output p>er mapping day 900 sqkm 300 sqkm Time for fieldwork preparation 1 day / 1 day / 4200 sq km 600 sq km The survey followed a two-step procedure: in the first step a map was compiled of agro-ecological zones and land units. This map was mainly based on the evaluation of climatic data, interpretation of satellite imagery, and a reconnaissance field sur vey. Beside the climatic information this map also includes some major soil boundaries. In a second 397

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