Orientador: Archimedes Perez Filho / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias / Made available in DSpace on 2018-08-15T01:28:21Z (GMT). No. of bitstreams: 1 Macia_ClementeJose_M.pdf: 4248296 bytes, checksum: e3b11f6049f394ac398421fa698ebc7d (MD5) Previous issue date: 2009 / Resumo: A região em estudo compreende as sub-bacias dos rios Changalane e Mazimunhama, afluentes do rio Tembe, situadas na província de Maputo, zona Sul de Moçambique. Esta região é reconhecida pelas autoridades administrativas nacionais e provinciais como estando sob pressão de uso agropecuário, desmatamento devido à exploração desenfreada das florestas, queimadas, pecuária extensiva de bovinos e caprinos. Estes fatos estão trazendo e acentuando problemas sócio-ambientais, nomeadamente, insegurança alimentar, baixa produtividade das culturas, erosão e assoreamento dos cursos de água. A avaliação e determinação da capacidade do uso das terras numa bacia hidrográfica são de vital importância para o planejamento e uso racional do solo e outros recursos da terra, dado que o uso inadequado e sem observância da sua capacidade do suporte tem provocado sua degradação. A partir de avaliações dos elementos do meio físico e das atividades desenvolvidas na região compreendidas entre as bacias de Chanagalane e Mazimunhama, com destaque para as de agropecuárias, fez-se uma avaliação das terras, pelo sistema de capacidade de uso, conjugado com as classes de manejo do sistema de aptidão agrícola das terras, a fim de atender ao planejamento e conservação dos recursos da terra e minimizar os problemas ambientais decorrentes do seu uso inadequado. Os dados foram gerados e integrados no SIG Arcinfo/Arcgis 9.2. Os planos de informação para entrada e cruzamento no SIG foram a carta de solos, cartas topográficas (Classes de declives) e uso das terras. Este último componente foi obtido por processamento digital de imagens ASTER. As análises permitiram concluir que a unidades de solos Bv (Basaltos vermelhos) de textura francoargilo- arenoso que ocorrem em declive plano (0-3%) cobrem a maior parte área de estudo com 172.8 km2 (30.1%); este solo foi avaliado como classe IIIs-p/f no sistema de capacidade de uso e 2ab(c) no sistema de avaliação para a aptidão agrícola, mostrando que é um solo adequado para o cultivo de culturas anuais e até perenes, porém têm problemas ligados a profundidade efetiva dos solos e à baixa fertilidade. Por causa da limitante profundidade não é recomendável o uso de mecanização pesada. A segunda unidade de solos que ocupa uma área considerável da área em estudo é a dos solos coluvionares (C) com 154.9 Km2 (26.9%) que ocorrem em relevo suave ondulado a ondulado e estão inclusos na subclasse IVs-sl/so. Estes solos são limitados pela salinidade e sodicidade e risco de inundação. / Abstract: The study area consists of the sub-basins of the Changalane and Mazimunhama rivers, tributaries of the Tembe river, situated in the Maputo province of Southern Mozambique. The region is recognized by the national and provincial authorities as being under pressure from: agricultural use, deforestation due to uncontrolled exploitation of forests, forest fires and the farming of cattle and goats. These factors are creating and exacerbating social and environmental problems, in particular: food insecurity, low crop yields, erosion and siltation of water courses. The evaluation and determination of land use capacity in a hydrographic basin is of vital importance to the planning and rational use of soil and other terrestrial resources given that misuse and disregard of this capacity lead to degradation. From an evaluation of the physical environment and the activities undertaken in the Chanagalane and Mazimunhama basin regions, especially those concerning argiculture, an assessment was made of the land use capability by combining the concepts of system management and agricultural fitness. The purpose of this evaluation was to address the issues of land-use planning and conservation in particular by minimizing the environmental problems arising from misuse. The data were generated and integrated using GIS Arcinfo/Arcgis 9.2. The information layers used included maps of both soil and topography (slope classes) as well a land use map. The latter component was obtained by the digital processing of ASTER images. The analysis showed that the Bv (Basaltos vermelhos) soil units, with a loam-clay-sandy texture, occur on the plains (slope; 0-3%) and cover most of the study area (172.8 km2, 30.1%). This soil was rated as Class IIIs-p/f when evaluated using the land-use capability system 2ab(c), indicating that it is adequate for the cultivation of annual and even perennial crops. However there exist problems regarding the depth of the soil and its low fertility, because of this limited depth it is not recommended to use heavy mechanization. The second soil unit, which occupies a considerable portion of the study area (154.9 km2, 26.9%), consists of the coluvionares soils (C). They occur in regions with mildly to considerably undulating relief and are included in the subclass IVs-sl/so. These soils are limited by their salinity, sodicity and flood risk. / Mestrado / Análise Ambiental e Dinâmica Territorial / Mestre em Geografia

Abstract The research focuses on rural environments and the questions concerning cultural environment surveys in land use planning. The main purpose of the study is to scrutinize how survey information serves planning. The focus is on pointing out the challenges which can be identified in data management and utilization of information. Main challenges are related to the extendedness and increasing workload of surveys, fragmentation of information and the emphasis put on expertise knowledge. The problems are mainly caused by the lack of well-established practical examples, partly on the hegemony of sector based planning and rationalist-comprehensive tradition in theory of science. Yet the surveys form basically the framework, in which the object or area is been reviewed in the preparation phase of planning. In that sense, the chosen methods in fact-finding also define which qualities primarily come into focus. Single methods or viewpoints and the theories they rely on enlighten the whole only in part. On this basis the aims of the study can be divided roughly in three sections – firstly to the critique of the current practices, secondly, conceptual definition of the structural components of the cultural environment itself, and thirdly, formulation of an integrative approach derived from the above mentioned points of departure. The general understanding of the interaction between man, culture and environment is achieved through phenomenological and existential hermeneutics. The person mapping or exploring the environment with his methods is seen as ”link” between the existing conditions and the future plan. Through that, the overall terms of perception and practice-bound preconditions of human interpretation will come under scrutiny. The study aims to ponder the integration of different approaches and angles, forming a ”toolkit” for environmental analytics and interpretation as a kind of a complexity management. Cultural environment surveys should be developed in a way that they would regard areas as thematic and functional entities instead of a sum of single elements. The research results are presented as a matrix of needs-and-goals -analysis, which forms a framework of assessment for values and desicions. The aim is to clarify the general set-up of land use planning which includes various stakeholders and is multidisciplinary by nature, especially in the context of cultural environments. The needs-and-goals -analysis is based on cultural environment profiling, which includes recognition of values and tolerance towards changes. The purpose of an integrative analysis is to bring out development possibilities and restrictions, together with different development goals. The intensions of different stakeholders should be brought out early enough, in order to prevent disagreements to evolve into conflicts and problems. / Tiivistelmä Tässä tutkimuksessa käsitellään maaseudun kulttuuriympäristöjä sekä maankäytön suunnittelun valmisteluvaiheessa tuotettuja kulttuuriympäristöselvityksiä. Tutkimuksessa tarkastellaan, miten suunnittelun tausta-aineistoina toimivat selvitykset ja niiden sisältämä tieto voitaisiin jäsentää palvelemaan paremmin suunnittelua. Tutkimuksessa on pyritty tuomaan esiin haasteita, joita tiedon hallinnassa ja hyödynnettävyydessä suunnittelun pohjaksi on voitu todeta. Pääasiallisesti nämä liittyvät selvitystiedon laajuuteen ja kuormittavuuteen, sektoroitumiseen ja asiantuntijanäkökulman korostumiseen. Tutkimuksessa esille tuodut ongelmat johtuvat osin selkeitten toimintamallien puutteesta, osin sektorisuunnittelun vahvasta taustavaikutuksesta sekä rationalistis-komprehensiivisesta perinteestä tieteenteoriassa. Kaavoituksen valmisteluvaiheen selvitykset muodostavat kuitenkin viitekehyksen, jonka puitteissa suunnittelualuetta tarkastellaan. Siten valitut tiedonhankinnan menetelmät määrittävät mihin ominaisuuksiin tarkastelun fokus ensisijaisesti painottuu. Käytännössä yksittäiset menetelmät tai niiden taustalla olevat tieteenalat valottavat kokonaisuutta kuitenkin vain osittaisesti ja hajanaisesti. Tutkimuksen tavoitteet voidaan jakaa karkeasti kolmeen eri osa-alueeseen - edellä mainittuun nykyisten käytäntöjen kritiikkiin, ilmiöstä itsestään määrittyvien rakennetekijöiden teoreettis-käsitteelliseen määrittelyyn sekä tähän nojautuvan integroivan lähestymistavan muodostamiseen. Tutkimuksessa hahmotellun kokonaiskäsityksen perustana on fenomenologisen ja eksistentiaalisen analytiikan keinoin määritelty ymmärrys ihmisen, kulttuurin ja ympäristön vuorovaikutuksesta. Tarkasteltavana ovat täten havainnoinnin yleiset edellytykset sekä ne käytäntösidonnaiset ennakkoehdot, joiden myötä selvityksen laatija muodostaa tulkintansa. Kulttuuriympäristöä tutkiva ihminen on keinovalikoimineen eräänlainen ”linkki” olemassa olevan ympäristön ja tulevan suunnitelman välillä. Tutkimuksessa on pohdittu eri näkökulmien integroitumista eräänlaiseksi organisoiduksi kompleksisuuden hallinnaksi, jonka perustana on havaintojen tekemisen ”välinekokonaisuus” kohteena olevan ympäristön piirteistä. Selvitysmenetelmiä tulisi kehittää ennen muuta siten, että kulttuuriympäristöjen tarkastelu teemallisten ja toiminnallisten kokonaisuuksien kautta mahdollistuisi nykyistä paremmin yksittäisten kohteitten sijaan. Tutkimuksen tuloksena esitetty tarve- ja tavoiteanalyysi muodostaa tulkintakehyksen suunnitteluvalinnoille ja toisaalta selkiyttää monitoimijaisen ja monialaisen suunnittelun lähtökohtia. Lähtökohtana on kulttuuriympäristöprofiilin laadinta, arvojen ja muutoksensietokyvyn määrittely sekä kehittämispotentiaalien esille nostaminen vaihtoehtoisten kehityspolkujen hahmottamisessa. Eri osapuolten tarpeet ja tavoitteet on myös tuotava esille riittävän aikaisin. Tällä on pyrittävä ennen muuta ehkäisemään ristiriitojen kehittymistä konflikteiksi ja asenteiden lukkiutumista vastakkainasetteluiksi.