The Tragowel Plains Irrigation District lies in the lower Loddon catchment of northern Victoria. Since the 1890s progressive development of the irrigation infrastructure of the Tragowel Plains has been accompanied by the development of irrigation induced soil salinity. In 1988 the State Government of Victoria supported the development of a community managed salinity management plan. At the same time, the water supply industry was significantly deregulated. Full cost recovery principles were applied to irrigation water pricing. Water entitlements were transformed into tradable commodities.The Tragowel Plains Salinity Plan was subsequently promoted by the Victorian government and the Loddon irrigation community as a model for encouraging structural change in a Commonwealth government facilitated regional development plan for the whole of the Loddon-Murray irrigation region. The process of developing this regional development plan revealed difference in the objectives of the various actors in this new planning process. The objective of community planners was the survival of the irrigation district. One of the objectives of Commonwealth was the transfer of water from low value use to high value use. These higher value uses were potentially elsewhere in the Murray Darling Basin. Further, these actors in the planning process used differing implicit models of the process of structural change in irrigation areas. The Commonwealth representatives had an implicit model of structural change in which farm consolidation was driven by the rate of exit from farming. They were also sceptical of the capacity of the Tragowel Plains salinity plan model to facilitate significant change in water use.

Made available in DSpace on 2015-05-07T14:49:19Z (GMT). No. of bitstreams: 1 parte2.pdf: 2851369 bytes, checksum: 7d81168f19872afa8d8f8bf527ba97df (MD5) Previous issue date: 2002-08-21 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The semi-arid region of the north-east Brazil, is characterized by drought, with low rainfall indices, high evaporation, high incoming solar radiation, and soils susceptible to salinization. In this scenario, populations seek the areas close to the ponds (locally known as açudes ), aiming to achieve satisfactory life condition and development. Ponds are found practically everywhere in the sertão . The ponds accumulate water during the rainy period, but not for a long time, because of periodic droughts and high evaporation. In the sub-basin of River Caraibeiras, in the municipality of Barra de Santa Rosa, there are two noteworthy ponds: Poleiro and Curimataú, both planned for water supply. It was aimed in the present study to estimate the water salinity indices of those ponds and how they affect socio-economic conditions in that region. Results obtained from the water physical-chemical analyses showed a high salt concentration, in the ponds, limiting the water consumption by humans, animals and crop irrigation. Such situation alters the habits of human communities and affects directly the socioeconomic condition in that region / O Semi-Árido do Nordeste brasileiro é caracterizado pela carência hídrica, baixos índices pluviométricos, alta evaporação e insolação e solos tendentes à salinização. É neste cenário que as populações procuram as áreas próximas aos açudes, com o objetivo de manter uma condição de vida satisfatória ao seu desenvolvimento. A presença de açudes ocorre em praticamente todo o sertão. Estes acumulam água no período chuvoso, não permanecendo assim por muito tempo, devido à ocorrência de secas periódicas e alta evaporação. Na Sub-bacia do Rio Caraibeiras, no município de Barra de Santa Rosa, dois açudes se destacam: o Poleiro e o Curimataú, com fins de abastecimento público. O presente estudo tem como objetivo avaliar o índice de salinidade das águas desses reservatórios e sua influência nas condições sócioeconômicas da região. Os resultados obtidos através de análises físico-químicas da água, registraram uma grande concentração de sais nas águas dos açudes, restringindo o uso para o consumo humano, dessedentação dos animais e na irrigação. Esta situação modifica os hábitos das comunidades e interfere diretamente nas condições socioeconômicas da região

Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-05-02T18:50:03Z No. of bitstreams: 1 RÔMULO CARANTINO LUCENA MOREIRA - DISSERTAÇÃO PPGSA ACADÊMICO 2016..pdf: 759575 bytes, checksum: 4aac2e1edbf081fcabeba6b5ea8b23fc (MD5) / Made available in DSpace on 2018-05-02T18:50:03Z (GMT). No. of bitstreams: 1 RÔMULO CARANTINO LUCENA MOREIRA - DISSERTAÇÃO PPGSA ACADÊMICO 2016..pdf: 759575 bytes, checksum: 4aac2e1edbf081fcabeba6b5ea8b23fc (MD5) Previous issue date: 2016-09 / A citricultura desempenha papel fundamental do ponto de vista social e econômico sendo produzido em quase todo o território nacional geral emprego e renda a pequenos, médios e grandes produtores. As regiões semiáridas e áridas do Brasil são caracterizadas por apresentar insuficiência hídrica e irregularidade de distribuição das chuvas e, desta forma o sistema de produção necessariamente depende da irrigação quem nem sempre disponibiliza de águas de boa qualidade. Diante disto objetiva-se estudar a tolerância de mudas de limão ‘Tahiti’ com distintos portaenxertos oriundos do cruzamento da tangerineira Sunki da Flórida (TSKFL) x Poncirus trifoliata Beneke (TRBK) sob irrigação com águas salinizadas durante a fase de formação do copa/porta-enxerto em casa de vegetação. O experimento foi conduzido em ambiente protegido (casa de vegetação) do Centro de Ciências e Tecnologia Agroalimentar da Universidade Federal de Campina Grande (CCTA/UFCG), localizado no município de Pombal-PB. O delineamento experimental foi em blocos ao acaso, e tratamentos arranjados em esquema fatorial, 2 x (19+3), relativos a dois níveis de salinidade da água de irrigação (0,3 e 3,0 dS m-1) e 22 combinações copa/genótipos. Utilizaram-se quatro blocos, com uma planta útil por parcela, totalizando 44 tratamentos e 176 parcelas. O aumento da salinidade da água elevou a condutividade elétrica do estrato de saturação e os teores de sais solúveis no substrato. A irrigação com água com água salina reduziu o acúmulo de fitomassa dos genótipos de citros, com exceção dos genótipos TSKFL X TRBK – 19, TSKFL X TRBK – 24, TSKFL X TRBK – 30, TSKFL X TRBK – 39, TSKFL X TRBK – 43, LCRSTC, LVK x LCR-038, identificados como tolerantes à salinidade. A combinação de ‘Tahiti’ com TSKFL X TRBK – 41 e SUNKI TROPICAL foram considerados sensíveis à salinidade dentre os materiais estudados. / Citriculture plays a fundamental role from the social and economic point of view, being produced in almost all the national territory general employment and income to small, medium and large producers. The semi-arid and arid regions of Brazil are characterized by water deficiency and irregular distribution of rainfall and, therefore, the production system necessarily depends on irrigation, which does not always provide good quality water. The objective of this study was to study the tolerance of 'Tahiti' lemon seedlings with different rootstocks of the Florida Sunki (TSKFL) and Poncirus trifoliata Beneke (TRBK) crosses irrigated with salinized waters during the crown formation / Rootstock greenhouse phase. The experiment was carried out in a protected environment (greenhouse) of the Center for Science and Technology Agro-Food of the Federal University of Campina Grande (CCTA / UFCG), located in the municipality of Pombal-PB. The experimental design was a randomized complete block design and treatments arranged in a 2 x factorial scheme (19 + 3), related to two irrigation water salinity levels (0.3 and 3.0 dS m-1) and 22 combinations/Genotypes. Four blocks were used, with one useful plant per plot, totaling 44 treatments and 176 plots. The increase of water salinity increased the electrical conductivity of the saturation stratum and the contents of soluble salts in the substrate. Irrigation with saline water reduced the phytomass accumulation of citrus genotypes, with the exception of TSKFL X TRBK - 19, TSKFL X TRBK - 24, TSKFL X TRBK - 30, TSKFL X TRBK - 39, TSKFL X TRBK - 43, LCRSTC, LVK X LCR-038, identified as salinity tolerant. The combination of 'Tahiti' with TSKFL X TRBK - 41 and SUNKI TROPICAL was considered sensitive to salinity among the studied materials.