DINÂMICAS AGRÍCOLAS PERIURBANAS E GESTÃO INTEGRADA DA ÁGUA: O CASO DE UMA BACIA PRODUTORA DE ÁGUA NA REGIÃO METROPOLITANA DE SÃO PAULO

摘要: O aumento da demanda domestica por agua potavel nos paises em via de desenvolvimento vem intensificando a competicao conta dos usos agricolas agua. Nas areas periurbanas, essa e ainda mais forte porque urbanizacao afeta o funcionamento hidrologico disponibilidade Esse caso Regiao Metropolitana Sao Paulo (RMSP), que aloja 18 milhoes habitantes. A desordenada acompanhada degradacao rapida qualidade do recurso reservatorios. regiao onde estao as represas captacao armazenamento para uso domestico RMSP ocupada com producao intensiva hortalicas irrigadas constitui uma reserva fundiaria habitacao baixa renda. Enquanto nova estrategia gestao integrada hidrico esta sendo implementada base participativa territorial, apresenta-se questao papel agricultura nesse tipo bacia. Se pressao urbana os sistemas producao, pode participar na protecao bacia, limitando ocupacao desorganizada. Para isso ocorra, comites bacia precisa ser melhorado, integrando utilizadores agricultura. Termos indexacao: agua, irrigacao, hidrografica, periurbana, . PERIURBAN AGRICULTURAL DYNAMICS AND INTEGRATED WATER MANAGEMENT: THE EXAMPLE OF CATCHMENT IN METROPOLITAN REGION SAO PAULO (BRAZIL) ABSTRACT Megacities development is putting an increasing pressure on water resources in their periurban areas. It raises the challenge of competition between potable supply and irrigated agriculture, context rapid land use changes, which results increased pressures availability quality. This case Tiete–Cabeceiras catchment Metropolitan Region (Brazil), only metropolitan where agriculture being represented committee – negotiation discussion body for management. diagnosis was implemented to analyze agricultural uses: production areas, farming cropping systems were identified by interviewing local experts farmers. Water harvesting these competes with two other main functions: crop poor population housing. Inadequate sanitation arrangement settlements responsible degradation The landscape this 1690 km² basin structured determinants: hydro-geomorphology urban pressure. 7,400 hectares are cultivated, mostly horticulture. Irrigation relies conventional aspersion individual pumping. Agriculture consumption roughly 3,3 m 3 /ha (29% total flow). While domestic uses, it also provides some environmental social services: contributes preservation forest fragments, prevents illegal occupation helps keeping network counterbalancing negative effect urbanization. functioning difficulties newly created make hard institution play properly its role body. thus played minor resolving recent conflicts involving agriculture. In context, evolution towards sustainable practices difficult anticipate technological solutions advocated many probably require various accompanying incentives: new institutional management adequate basis develop action plan Index terms: integrated management, irrigation, catchment, Brazil. DYNAMIQUES AGRICOLES PERIURBAINES ET GESTION INTEGREE DE L'EAU: CAS D'UN BASSIN-VERSANT PRODUCTEUR D'EAU DANS LA METROPOLITAINE (BRESIL) RESUME L'augmentation la demande en eau dans les agglomerations du Sud s'accompagne d'une croissante avec usages agricoles l'eau. Cette est encore plus bassins-versants periurbains dont l'urbanisation affecte le fonctionnement hydrologique. C'est cas region metropolitaine (RMSP) qui heberge millions d'habitants. L'urbanisation mal controlee zones captage rapide qualite ressource reservoirs. Les ou sont localises barrages collecteurs et stockage l'eau destinee occupees par une maraichere irriguee intensive constituent reserve fonciere pour l'habitat des populations demunies. Alors qu'une nouvelle strategie gestion integree mise œuvre sur participative territoriale, se pose question place l'agriculture ce type bassin-versant. Si pression urbaine systemes production, participe protection bassin-versant contre controlee. Mais doit etre ameliore mieux integrer usagers Termes d'indexation: l'eau, captation, bassin hidrografique, periurbaine, Bresil.