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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Conservation Planning, What Is Used And What Is Needed: A Needs Assessment Survey Of The Natural Resources Conservation Service

Murdock, Jeremy Neal 15 December 2007 (has links)
How important is conservation planning to society today? It impacts the quality of our most precious natural resources: water, air, soil, wildlife, and plant material as well as every aspect of one of the largest industries in the United States: agriculture. In order to gain a better understanding of the conservation planning process, as well as the elements involved in creating an effective conservation plan, a Web-based survey was administered to one of the leaders in the advancement of conservation planning and planning technology, the United States Department of Agriculture’s (USDA’s) Natural Resources Conservation Service (NRCS). The purpose of this study is to identify the trends and needs within the Mississippi NRCS, as well as to identify the characteristics of a potential end user of a conservation planning tool. The purpose of the survey was to identify the agents’ comfort levels with the conservation planning process, conservation practice design and implementation, numerous incentive programs, water quality testing, and most importantly digital technology.
2

Water Harvesting for Integrated Water Resources Management and Sustainable Development in Khartoum State

Hassan Mahmoud, Wifag 21 October 2013 (has links) (PDF)
Khartoum State in Sudan is subject to the erratic and intense rainfall during the short rainy season and dryness and heat throughout the rest of the year. High intensity rainstorms with a short duration have become more frequent in the area during the last two decades resulting in cities inundation and flash floods in the rural parts. On the other hand, the dry season means hot weather in the urban parts and water shortage in the rural part. Rural areas are dependent on the runoff water brought about by the seasonal streams as a source of water. For this study, Khartoum City Center and Seleit area were taken to investigate the application of water harvesting in the urban and rural areas, respectively. Accordingly, the hydrological characteristics and the specification of the potential water harvesting sites and systems were examined. For Khartoum City Center, characteristics of the drainage system were examined using ArcGIS platform. It is found that the drainage system covers 42% of the area with total capacity of 24000 m3. Daily rainfall data for urban meteorological station were used to calculate the probability and the return period of the rainfall, as well as the potential runoff. Rainfall probability of occurrence was calculated applying Gumbel distribution method for extreme events that were arranged according to the Peak-over-Threshold method. The potential runoff that could be generated from a certain rainfall was calculated using the Natural Resources Conservation Services method provided by the United States Department of Agriculture (US-NRCS). Accordingly, the curve number was calculated depending on the land use/land cover and the hydrological soil group. Consequently, the weighted curve number is found to be 94%, indicating dominant imperviousness. 13.1 mm rainfall depth produces runoff volume equal to the drainage system capacity with return period of one year; whereas more than four folds the drainage system capacity is produced by 30 mm rainfall depth that is considered the threshold for raising flood hazard. Six potential sites for roof rainwater harvesting were selected. Accordingly, it is found that, the application of roof water harvesting in 18% and 72% of the commercial and business district buildings can accommodate the runoff resulting from the 13.1 and 30 mm rainfall depth, respectively. Hence, impounding rainstorm water would help managing the urban runoff water, and consequently, the stored water could be used for making more green areas that will enhance the urban environment. Three watersheds of ephemeral streams (wadi), namely Wadi El Kangar, Wadi El Seleit, and Wadi El Kabbashi make up Seleit area. Distinct maps were prepared in ArcMap for the calculation of the potential runoff and the specification of the appropriate water harvesting sites and systems. The Wadis watersheds areas are found to be 540, 344 and 42 km2 for Wadi El Kangar, Wadi El Seleit and Wadi El Kabbashi, respectively. Daily rainfall data of rural meteorological station were classified into three groups representing the soil dry (AMCI), moderate (AMCII), and wet (AMCIII) moisture conditions; the respective CNI, CNII, and CNIII values were calculated accordingly. The weighted CN values indicate high runoff potential within the three soil moisture conditions. Accordingly, the rainfall thresholds for runoff generation for AMCI, AMCII and AMCIII conditions are found to be respectively 18.3 mm, 9.1 mm and 4.4 mm for Wadi El Kabbashi and 22 mm, 11 mm and 5 mm for both Wadi El Seleit and Wadi El Kangar. El Kangar dam subwatershed was used for calibrating the potential runoff calculated by the NRCS method. Since the Wadis are ungauged, Google Earth and GIS platforms were used to calculate geometrically the volume of the dam reservoir water for three years. This volume was compared to the annual runoff calculated by the NRCS method. Consideration to different factors was made to locate the potential water harvesting sites. Accordingly, water harvesting systems for fodder and crop plantation; sand storage surface or subsurface dams; or groundwater recharge, were specified. The socio-economic study revealed that the financial capacity, if any, of the villagers is very limited. Thus, the financial source for the construction of the suggested potential water harvesting or the rehabilitation of the existing ones is questionable. Hence, other potential financial sources are needed to help executing water harvesting projects in the region, e.g. Khartoum State Government. Applying water harvesting in Seleit area is found to be promising. Improving the livelihood of the villagers by applying runoff water harvesting could assure better water accessibility, better income generation from farms production, and allocation of time for other activities, e.g. education. This would be reflected in reduced migration to nearby cities and stabilized market supply of agricultural and animal products. Therefore, the development of the rural part is of great benefit to the development of Khartoum State, as long as the interdependency and mutual benefit between the rural and urban areas, represented by the local food and labor market, remain exist.
3

Water Harvesting for Integrated Water Resources Management and Sustainable Development in Khartoum State

Hassan Mahmoud, Wifag 17 July 2013 (has links)
Khartoum State in Sudan is subject to the erratic and intense rainfall during the short rainy season and dryness and heat throughout the rest of the year. High intensity rainstorms with a short duration have become more frequent in the area during the last two decades resulting in cities inundation and flash floods in the rural parts. On the other hand, the dry season means hot weather in the urban parts and water shortage in the rural part. Rural areas are dependent on the runoff water brought about by the seasonal streams as a source of water. For this study, Khartoum City Center and Seleit area were taken to investigate the application of water harvesting in the urban and rural areas, respectively. Accordingly, the hydrological characteristics and the specification of the potential water harvesting sites and systems were examined. For Khartoum City Center, characteristics of the drainage system were examined using ArcGIS platform. It is found that the drainage system covers 42% of the area with total capacity of 24000 m3. Daily rainfall data for urban meteorological station were used to calculate the probability and the return period of the rainfall, as well as the potential runoff. Rainfall probability of occurrence was calculated applying Gumbel distribution method for extreme events that were arranged according to the Peak-over-Threshold method. The potential runoff that could be generated from a certain rainfall was calculated using the Natural Resources Conservation Services method provided by the United States Department of Agriculture (US-NRCS). Accordingly, the curve number was calculated depending on the land use/land cover and the hydrological soil group. Consequently, the weighted curve number is found to be 94%, indicating dominant imperviousness. 13.1 mm rainfall depth produces runoff volume equal to the drainage system capacity with return period of one year; whereas more than four folds the drainage system capacity is produced by 30 mm rainfall depth that is considered the threshold for raising flood hazard. Six potential sites for roof rainwater harvesting were selected. Accordingly, it is found that, the application of roof water harvesting in 18% and 72% of the commercial and business district buildings can accommodate the runoff resulting from the 13.1 and 30 mm rainfall depth, respectively. Hence, impounding rainstorm water would help managing the urban runoff water, and consequently, the stored water could be used for making more green areas that will enhance the urban environment. Three watersheds of ephemeral streams (wadi), namely Wadi El Kangar, Wadi El Seleit, and Wadi El Kabbashi make up Seleit area. Distinct maps were prepared in ArcMap for the calculation of the potential runoff and the specification of the appropriate water harvesting sites and systems. The Wadis watersheds areas are found to be 540, 344 and 42 km2 for Wadi El Kangar, Wadi El Seleit and Wadi El Kabbashi, respectively. Daily rainfall data of rural meteorological station were classified into three groups representing the soil dry (AMCI), moderate (AMCII), and wet (AMCIII) moisture conditions; the respective CNI, CNII, and CNIII values were calculated accordingly. The weighted CN values indicate high runoff potential within the three soil moisture conditions. Accordingly, the rainfall thresholds for runoff generation for AMCI, AMCII and AMCIII conditions are found to be respectively 18.3 mm, 9.1 mm and 4.4 mm for Wadi El Kabbashi and 22 mm, 11 mm and 5 mm for both Wadi El Seleit and Wadi El Kangar. El Kangar dam subwatershed was used for calibrating the potential runoff calculated by the NRCS method. Since the Wadis are ungauged, Google Earth and GIS platforms were used to calculate geometrically the volume of the dam reservoir water for three years. This volume was compared to the annual runoff calculated by the NRCS method. Consideration to different factors was made to locate the potential water harvesting sites. Accordingly, water harvesting systems for fodder and crop plantation; sand storage surface or subsurface dams; or groundwater recharge, were specified. The socio-economic study revealed that the financial capacity, if any, of the villagers is very limited. Thus, the financial source for the construction of the suggested potential water harvesting or the rehabilitation of the existing ones is questionable. Hence, other potential financial sources are needed to help executing water harvesting projects in the region, e.g. Khartoum State Government. Applying water harvesting in Seleit area is found to be promising. Improving the livelihood of the villagers by applying runoff water harvesting could assure better water accessibility, better income generation from farms production, and allocation of time for other activities, e.g. education. This would be reflected in reduced migration to nearby cities and stabilized market supply of agricultural and animal products. Therefore, the development of the rural part is of great benefit to the development of Khartoum State, as long as the interdependency and mutual benefit between the rural and urban areas, represented by the local food and labor market, remain exist.
4

Redesign of core business processes of the national building regulations of South Africa

Mazibuko, Patricia Ntombizodwa January 2016 (has links)
Theses (MTech (Business Information Systems))--Cape Peninsula University of Technology, 2016. / This paper describes the redesigning processes of the National Building Regulations of South Africa. These processes are administered by the National Regulator for Compulsory Specifications (NRCS) in terms of the National Building Regulations and Building Standards Act 103 of 1977 (The Act). The application of the business processes and the Building Control Officers from various local authorities nation-wide who enforce the National Building Regulations and Building Standards Act, 103 of 1977 (hereinafter referred to as “the Act”) with particular reference to implementation of core regulatory business processes within the building industry in Southern Africa. The investigation was largely motivated by the high number of injuries, deaths and/or human lives affected adversely and reported due to collapsing and defective buildings. These disasters occurred at various Local Authorities, in private residential homes, government-owned buildings, abandoned and commercial buildings, such as shopping malls, have been investigated and reported by the Building Regulator, i.e. the NRCS in collaboration with the Department of Labour’s Commission of Enquiry between the years 2012 and 2014. The reports show that in those sectors of building, the local authorities’ Building Control Officers, as the legislated enforcers of the Building Regulations (with the oversight role played by the NRCS), experienced the highest levels of non-compliance by various parties who are affected by the Building Regulations, i.e. building owners or their legal representatives, built-environment professional practitioners and builders. This study applies the interpretive approach underpinned by qualitative methodology where interviews were used to collect data from building owners, prospective building owners, building occupants, built-environment practitioners, Local Authorities’ building control officers and The Regulator of the National Building Regulations. The empirical findings revealed that there is a critical need for business process review and strategy shifts that advance objectivity and benefits to compliance, visibility and awareness of regulatory process, the highlights of possible endangerment of human life due to non-compliance, the outlining of sanctions for failure to comply, and stakeholder liaison. The output is a re-module of business processes that will enforce and maintain compliance of the building regulations of South Africa.
5

Studies of Electromagnetic Backscattering from Ocean Surfaces

Wijesundara, Shanka N. January 2019 (has links)
No description available.
6

Stream water quality under baseflow conditions in a livestock production area

Chavarro Chaux, Maryi Lorena 08 December 2023 (has links) (PDF)
This study evaluates the spatial and temporal impacts of implemented Best Management Practices (BMP) on stream water quality under baseflow conditions in a stream segment affected by livestock production. The BMPs includes 10-m fenced riparian zone and crossing paths along the reach segment. Grab water samples and water quality monitoring were collected biweekly from July 2019 to March 2022. Water quality parameters included temperature, dissolved oxygen, electric conductance, total dissolved solids, turbidity, and pH. Water samples were lab analyzed for sediments and nutrients. Results evidenced poor water quality before BMPs implementation, with nutrient concentrations exceeding the nation's and state's criteria. Two years after implementation, BMPs favored seasonal and spatial reductions in nutrient, sediment concentrations, and improved water quality parameters. Present results and subsequent stream monitoring should create awareness in private owners to extend the implementation of a riparian zone and other BMPs that improves stream water quality and health.
7

Beyond random acts of conservation : an institutional analysis of the Natural Resource Conservation Service's Agricultural Water Enhancement Program

Burright, Harmony S. J. 01 June 2012 (has links)
Irrigated agriculture accounts for 90 percent of consumptive use of freshwater in the western US and is considered the largest contributor to nonpoint source water pollution. The diffuse nature of most water quality and quantity challenges necessitates institutions that can more effectively engage agricultural producers in strategic, integrated, watershed-scale approaches to water management such as those associated with Integrated Water Resource Management (IWRM). With approximately 9,400 professionals working in nearly every one of the nation's 3,071 counties and an emphasis on voluntary, incentives-based approaches to conservation, the Natural Resources Conservation Service (NRCS) is well poised to influence land and water management on private working lands. NRCS conservation programs, however, have been criticized as "random acts of conservation" that lack a strategic vision for addressing natural resource challenges at-scale. Using NRCS's new Agricultural Water Enhancement Program (AWEP) as a case study, this paper seeks to examine the factors that enable or inhibit NRCS from promoting an integrated approach to water management consistent with IWRM principles. Following the Institutional Analysis and Development (IAD) framework this paper traces the development of AWEP and examines how the rules established at the national level impact implementation at the national, state and local levels. The paper then evaluates AWEP based on a set of six IWRM design principles to determine (a) the extent to which AWEP represents an IWRM approach, and (b) the institutional factors that facilitate or inhibit NRCS from taking a more integrated approach to water management. I found that institutional factors vary greatly between levels of analysis depending on the specific context, but did identify several consistent enablers and barriers. The three most significant factors that facilitate an IWRM approach are: (1) AWEP's focus on priority resource concerns within a defined hydrographic area; (2) AWEP's emphasis on pursuing a partnership-based approach; and (3) increased local involvement in defining projects. The three most significant factors that inhibit an IWRM approach are: (1) a lack of clarity concerning partner roles and responsibilities and constraints on partner involvement; (2) limited flexibility of existing program rules; and (3) limited local capacity to engage with landowners and implement projects. The paper offers institutional recommendations for facilitating an IWRM approach within NRCS, and concludes with a consideration of the utility of IWRM design principles and the IAD framework for analyzing water management institutions. / Graduation date: 2012
8

Modelling of nonpoint source pollution in the Kuils River Catchment, Western Cape - South Africa

Ayuk, James Ayuk January 2008 (has links)
>Magister Scientiae - MSc
9

Modelling of nonpoint source pollution in the Kuils River catchment, Western Cape - South Africa

Ayuk, James Ayuk January 2008 (has links)
>Magister Scientiae - MSc / The Kuils River Catchment is an urban river catchment that forms part of the larger Kuils-Eerste River system draining the eastern half of the Cape Metropolitan Authority area and Stellenbosch Municipality. Rapid urbanisation has resulted in the encroachment of residential and industrial areas into the river system through channelization and sewage disposal. This research project intends to assess the quality of surface runoff in the Kuils River catchment and determining non-point source pollutant loading rates in the catchment using GIS-based modelling. The study results show how modelled potential sources of surface runoff and NPS pollutants using desktop GIS analysis tools in a sequential process that involved different levels of software applications could explain the characteristics of the catchment. With the help of the Expected Mean Concentration (EMC) values associated with surface runoff from land use/covers, NPS pollutant loads were assessed downstream towards the Kuils River Catchment outlet using the Nonpoint Source Pollution and Erosion Comparison Tool (N-SPECT) based in ArcGIS. The outputs from this model consist of predicted annual pollutant loading (mg/mvyear) for each Kuils-Eerste River that occurs in the catchment. The results have shown clearly the spatial distribution of sources of particular pollutants in the catchment. Further or advanced processing knowhow with this model might provide far reaching insights into the problem and it is however recommended that these results produced using N-SPECT be compared to those of other hydrologic models using the same inputs.

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