A computer model for use in predicting the impact of various improvement options on command area expansion of a deep tubewell irrigation system has been developed. A field study was conducted on 11 selected deep tubewells located at two sites, namely Dhamrai and Thakurgaon, in Bangladesh to collect necessary physical data to provide irrigation engineering insight and a basis for testing and application of the model. The results of the investigation revealed that the actual discharge of most of the deep tubewells was lower than the design or rated capacity. The duration of pump operation in the majority of the study deep tubewell areas was extremely low. The conveyance losses in all of the study systems were very high. Even though a portion of those losses was reused in the system, particularly in rice growing areas, they caused serious difficulty in delivering water to remote fields, thus, restricting the command area. The overall irrigation efficiencies in all of the wheat growing areas of Thakurgaon were low. Considerable losses and waste of water after it was diverted from the field channels due to lack of leveling and poor water control were mostly responsible for the low efficiencies . Excessive percolation losses due to inadequate puddling of the soils during land preparation and frequent drought conditions resulted from poor distribution of water in some of the rice growing areas of Dhamrai caused relatively low overall irrigation efficiencies. The overall efficiencies of the pumps both driven by diesel engine and electric motor were found to be much lower than the recommended values. The developed model was applied to predict the expected command area under both existing and modified physical conditions. The model predicted command areas were compared with the actual field observed values and necessary adjustments were discussed. The impact of each of the improvement alternatives considered in the study was determined by comparing the predicted command area under the modified conditions with that under the existing physical settings. An economic analysis was performed to determine the cost effectiveness of most of the alternatives. Application of the model in evaluating the farmers' pump operation practices was demonstrated. Use of the model to assist the farmers in planning the command area and delivery schedule was also indicated. Although the model was developed to use in a deep tubewell irrigation system, it can also be used in the system served by a low-lift pump or by a turnout in a large irrigation project.

LD2668 .T4 1966 E65 / Master of Science

The decision to commence the Ord River Irrigation Scheme in the East Kimberley region of Western Australia had extensive political repercussions in national and state politics . The thesis is introduced with an analysis of the decision in relation to the literature of decision making theory, in particul are the two most actively supported decision making theories the rational and the incremental approaches. The thesis demonstrates that the Ord River Scheme accords with the empirical patterns of incremental decision making, The processes of decision making on the Ord River Scheme involved a seemingly endless sequence o f small, incremental and unco-ordinated adjustments on the part of both the Commonwealth and the Western Australian governments. The initial chapters trace the early exploration of the Kimberley region, the state encouraged experiments in tropical agriculture in the 1920's and the early plans for settlement in, and development of the area. Later chapters analyse the main decisions made by both the Commonwealth and Western Australian governments relating to the development of the region - decisions concerning the establishment of Kimberley Research Station, the construction of the Ord River Diversion Dam and early farming developments. The thesis then examines the attempt by both the Commonwealth and Western Australian governments to inject some rationality into the decision making process on the Ord, in the form of cost benefit analysis , the Commonwealth government's agreement of 1967 t o finance the construction of the Main Ord Dam and finally, the Western Australian government's decision in 1974 to abandon cotton growing.

Thesis (M.S. - Agricultural Economics)--University of Arizona. / Includes bibliographical references.

Magister Artium (Development Studies) - MA(DVS) / The establishment of the Dotito-Muchenje irrigation project was an endeavour initiated by the Government of Zimbabwe, to empower local people. It was done to improve the livelihoods of the people. However, despite the launch of the project, socio-economic challenges remain pressing issues. The inability to make decent livelihoods continues to affect rural farmers, resulting in the scheme being unable to be fully-functional. The problems thus undermine the capability of the project to address poverty and inequality, which was core to the project initiation. This research focuses on an outcome assessment of the irrigation project as it relates to the livelihoods of people in the Dotito rural communal area. Both quantitative and qualitative methodologies were used in the study. Twenty-four farmers, out of a possible ninety farmers, were selected to complete questionnaires. Radom sampling was used to identify and select participants. Data collection was done using interviews, questionnaires and observations. Analyses were done using descriptive statistics. Tables and graphs were presented based on the information gathered from the farmers. The research findings show that the Dotito-Muchenje irrigation scheme partly managed to empower the local people. Some of the indicators used include: employment creation, income generation, and changes to the socio-economic livelihoods of beneficiary farmers. However, lack of support and the prevailing economic situation are among the many challenges that make it difficult for the farmers to achieve their full potential in terms of improving their livelihoods. Another challenge relates to water availability. Irrigation pumps at the irrigation scheme use electricity to supply water needed by the farmers, thus there is inadequate water supply. This is because the electricity supply has long been cut-off due to the arrears accumulated by the farmers. It has rendered the irrigation partially functional, resulting in low productivity. The low crop yield makes it difficult to fully address the food security situation for the people. While others blame the situation on the land reform, based on evidence from development practitioners and farmers interviewed, the unsuccessfulness of the irrigation could be attributed to lack of project tracking (monitoring and evaluation) by government. It is in this context that intervention by the government, non-governmental organizations and the Zimbabwe Electricity Supply Authority, is recommended to ensure the viability and sustainability of the irrigation scheme and facilitate its positive impact on rural livelihoods.

No description available.

This study examines potential livelihood outcomes from a recently established irrigation project in Ta Haen, Cambodia, in a sustainable livelihoods framework. The aim of this SAUCE irrigation project is to provide water for drinking and irrigation purposes with the goal of enhancing food by producing an extra rice harvest, the staple, per year. Field research conducted in December 2011 provided qualitative data from questionnaires, key informant interviews, and participant and direct observation, in addition to quantitative data from water quality analysis focusing on arsenic (a potential risk), pH, EC and temperature. Most of the people in the village did not obtain an extra rice harvest in this first year of the project. However, they did plant other crops along the Ta Haen riverbanks. Average arsenic concentration was 32 ppb, above WHO guideline value (10 ppb). However, dose response data is uncertain at levels below 50 ppb, which makes river water use acceptable given that this is a major water source for the community. Preliminary results suggest that project sustainability and positive livelihood outcomes depend upon improving overall agricultural and water management practices by addressing quality issues, rationing water, and removing invasive water hyacinths that affect water quantity.

This thesis examines how the Narmada damming project in India is constituted and contested by the state, affected tribal peoples ( adivasis), and a transnational advocacy network led by the Narmada Bachao Andolan (Save the Narmada Movement). Based on ethnographic fieldwork, and employing critical anthropological perspectives on development and globalization, the power relations underlying dominance and resistance are mapped out. The conflicting discourses, strategies and practices of Narmada proponents and opponents are conceptualized within local, regional, national, and transnational sites and modalities. Further, the negotiation of state dominance and adivasi resistance is analyzed through contradictory practice and shifting political alignments. Lastly, this thesis delineates how the Narmada conflict is permeated by complex symbolic and moral mechanisms activated by both state authorities and activist resistors.

Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-06-04T18:21:18Z No. of bitstreams: 1 SOAHD ARRUDA RACHED FARIAS - TESE PPGEA 2006..pdf: 106641017 bytes, checksum: 00962c5527d6dea906019cefb658d12c (MD5) / Made available in DSpace on 2018-06-04T18:21:18Z (GMT). No. of bitstreams: 1 SOAHD ARRUDA RACHED FARIAS - TESE PPGEA 2006..pdf: 106641017 bytes, checksum: 00962c5527d6dea906019cefb658d12c (MD5) Previous issue date: 2006-10 / Propõe-se, no presente trabalho, uma avaliação de custos de energia e água. dentro do planejamento agrícola irrigado obtendo-se, inicialmente, as demandas brutas de água e energia para as culturas do coco anão (Cocos nucifera L.), mamão {Carica papayá) e banana pacovã {Musa spp) em 14 municípios do Nordeste Brasileiro e se utilizando dois sistemas pressuridados, através de uma simulação de projeto agronómico de irrigação. O menor consumo de água anual previsto para irrigação foi na localidade de Mamanguape, PB, necessitando-se apenas de 37,4%; 35,5% e 41,4% respectivamente, para as culturas de coco anão, mamão e Banana pacovã, com relação ao consumo obtido na localidade de maior consumo (Petrolina, PE). Obtiveram-se áreas potenciais para irrigação empregando-se o mesmo conjunto eletrobomba (7,5 CV e vazão de 22 m3 h"1) para as culturas de coco anão, mamão e banana pacovã, respectivamente, de 13,65 ha (localizada) e 4,54 ha (aspersão); 9,45 ha (localizada) e 5,18 ha (aspersão) e 6,25 ha (localizada) e 3,63 ha (Aspersão). A crescente demanda de água e energia ocorreu praticamente combinada pela escala de classificação climática de Hargreaves (1974b), onde percorreu a menor necessidade de complementação o município dc Mamanguape, PB (Clima Seco-Úmido), sequenciado, Pacatuba, SE, Maceió, AL, Aracaju, SE, Natal, RN, Campina Grande, PB, posteriormente os municípios Acaraú, CE, Aracati, CE e Touros, RN de clima Semi-Arido, Canindé de São Francisco, SE, Sousa, PB e Jaguaribe, CE com clima Árido e Açu, RN e Petrolina, PE classificados como de clima Muito Árido. A cultura do coco anão seria a mais penalizada economicamente pela cobrança da água, em virtude do menor custo de manutenção com relação às outras duas culturas da análise. Os valores obtidos através deste estudo poderão ser utilizados como parâmetros de planejamento agrícola irrigado, com maior confiabilidade, quando as médias obtidas, forem agrupadas por clima e os coeficientes de variação apresentarem valores baixos (menor que 10%), desde que tenham características de dimensionamento semelhantes às deste trabalho. E importante observar o comportamento de demanda de irrigação como forma de se avaliar atribuições de tarifa de água bruta, evitando possíveis distorções económicas decorrentes de climas diferenciados em uma mesma bacia hidrográfica / It is considcred, in the present work, an evaluation of costs of energy and water. inside o; the agricultural irrigated planning, getting at first the raw demands from water and energy for the cultures of the dwarfed coconut (Cocos nucifera L.), papaya (Carica papaya) and pacovã banana (Musa spp) in 14 cities from northeast Brazil and if used two pressured systems, through a simulation of agronomic project of irrigation. The lesser foresecn annual water consumption for irrigation was in the locality of Mamanguape, PB, needing itself only 37.4%; 35.5% and 41.4% respectively, for the cultures of dwarfed coconut, papaya and pacovã Banana, based on the consumption gotten in the locality of bigger consumption (Petrolina, PE). Areas with good chance for irrigation had gotten the same using electropumps (7.5 CV and 22 outflow of m3 h"1) for the cultures of dwarfed coconut, papaya and pacovã banana, respectively, of 13.65 ha (located) and 4.54 ha (aspersion); 9,45 ha (located) and 5,18 ha (aspersion) and 6.25 ha (located) and 3.63 ha (Aspersion). The increasing demand of water and energy practically occurred combined by the scale of climatic classification of Hargreaves (1974b), whcre the city of Mamanguape PB (Dry-Wet climate), covered the lesser needs for complementation, following with Pacatuba, SE, Maceió, AE, Aracaju, SE, Natal, RN, Campina Grande, PB, later the cities Acaraú, CE, Aracati, CE and Touros, RN of Semi-Arid climate, Canindé do São Francisco, SE, Sousa, PB and Jaguaribe, CE, with Arid climate and Açu, RN and Petrolina, PE classified as of Very Arid climate. The culture of the dwarfed coconut would be punished economically by the water taxes, because of the lesser cost of maintenance related to the others two cultures in analysis. The values gotten through this study could be used as parameters for irrigated agricultural planning, with bigger trustworthiness, when the gotten averagcs, will be grouped by climate and the coefficients of variation will present low values (lesser than 10%), since they have similar sizing characteristics to the ones of this work. It is important to observe the behavior of irrigation demand as a way of evaluating attributions of raw water taxes, avoiding possible economic distortions due to differentiated climates in one same hidrografic basin.