|
|
|
| Registros recuperados: 14 | |
|
| |
|
| |
|
|
| Ancev, Tihomir; Stoecker, Arthur L.. |
| Phosphorus pollution from excessive litter application causes eutorphication of lakes in the Eucha-Spavinaw watershed in eastern Oklahoma and western Arkansas. Consequent algal blooms impair the taste of municipal water supply drawn from the watershed. The paper shows how GIS data based biophysical modeling can be used to derive spatially optimal, least-cost allocation of management practices to reduce phosphorus runoff in the watershed. Transportation activities were added to the model so that transport of litter within and out of the watershed was possible. Results from the mathematical program suggest that uniform regulation of litter application is excessively costly regulatory measure and hence a regulation that assigns management practices according... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/35005 |
| |
|
|
| Pradhan, Deepa; Ancev, Tihomir; Drynan, Ross G.; Harris, Michael. |
| Communal water storage reservoirs (embungs) that serve many villages in West Timor, Indonesia, by providing water during the prolonged annual dry season are experiencing severe sedimentation problems. Sedimentation of reservoirs progressively reduces their water storage capacity and the benefits to community. This paper investigates four alternative strategies for managing the sedimentation of a typical village embung: (1) current management (a “no management” situation), (2) soil conservation in the embung catchment, (3) periodic sediment removal and (4) both soil conservation and sediment removal. Without periodic sediment removal, an embung has a finite life dependent on the rate of sedimentation. The results indicate that periodic cleaning is clearly... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Management; Reservoir; Sediment; Water use; West Timor. |
| Ano: 2009 |
URL: http://purl.umn.edu/48052 |
| |
|
| |
|
|
| Spencer, Thomas; Ancev, Tihomir. |
| Irrigation induced salinity is a serious problem in many countries around the world. In Australia, this type of salinity is most pronounced in the valley of the River Murray in South Australia. Location of irrigation enterprises has been identified as a key factor that needs to be taken into account by policies aimed at mitigating salinity. This article compares and contrasts two such policies: an irrigation zoning policy, where new irrigation enterprises are only allowed in low salinity impact zones, and an offsetting with salinity credits policy, where new irrigation enterprises can locate in high salinity impact zones, provided they offset their salinity impact with salinity credits. Key findings are that the offsetting policy will be both less costly... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Irrigation; Least-cost; Offsets; Salinity; Land Economics/Use; Q15; Q18; Q25; Q50. |
| Ano: 2006 |
URL: http://purl.umn.edu/25517 |
| |
|
| |
|
|
| Ancev, Tihomir; Stoecker, Arthur L.; Storm, Daniel E.. |
| Phosphorus pollution from excessive litter application and municipal discharges causes eutorphication of lakes in the Eucha-Spavinaw watershed in eastern Oklahoma and western Arkansas. Consequent algae blooms impair the taste of drinking water supply drawn from the watershed and reduce the recreational values of the lakes. The paper shows how GIS data based biophysical modeling can be used to derive spatially optimal, least-cost allocation of agricultural management practices to be combined with optimal wastewater treatment activity from the point source in order to achieve socially optimal phosphorus load in the watershed. The optimal level of phosphorus load is determined by equating marginal abatement with marginal damage cost. Transportation... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/22179 |
| |
|
|
| Ancev, Tihomir; Carter, Scott D.; Stoecker, Arthur L.. |
| Livestock waste management issues are of growing environmental concern in the United States and elsewhere. Lowering the quantity of nutrients excreted by pigs can ease associated environmental problems and at the same time can reduce waste management costs. Reduction in nutrient excretion can be achieved by feeding pigs with low crude protein diets. The paper develops a procedure for calculation of swine waste management costs as function of four dietary regimes. Feeding low crude protein diets significantly reduced amount of nitrogen excreted by pigs. As a result, reduction in waste management costs may be achieved, especially when the pig farm does not have enough land to apply all the manure it generates. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Livestock Production/Industries. |
| Ano: 2002 |
URL: http://purl.umn.edu/19659 |
| |
|
| |
|
| |
|
|
| Marawila, T.D.; Ancev, Tihomir; Odeh, Inakwu O.A.. |
| In this study a spatially explicit economic analysis was employed to determine the land use change in a traditional coconut growing district of Sri Lanka. From a theoretical model of land use, an econometric framework was developed to incorporate spatial and individual effects that would affect the land use decision. Markovian transition probabilities derived from the econometric analysis and spatial analysis was used to predict the land use change over the next 30 years. The results revealed that the fragmentation and conversion of coconut lands to urban continue in the areas close to the urban centre and also with less productive lands. Spatial analysis provides further evidence of the positive trend of conversion of coconut lands to urban uses close to... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/100583 |
| |
|
| |
| Registros recuperados: 14 | |
|
|
|
