Thesis (M.A.)--Oregon State University, 1987. / Typescript (photocopy). Mounted photographs. Includes bibliographical references (leaves 77-79). Also available online.

No description available.

No description available.

This thesis is concerned with the earthwork and timber castles built in the southern March of Wales between the periods AD 1050-1250. The research addresses the presence of the castles and discusses their roles as weapons of conquest and structures of administrative control. It is argued that the recognisable change in the form of earthwork castle construction over the 200 year period can be seen as a consequence of changing functions. Although it has not been possible to demonstrate how the area within a castle was used, it has been possible to identify a difference in the degree of defence verses habitation space associated with these structures. A system of classification is introduced which relies on the tenet of "form follows function" whereby all of the known earthworks are interpreted as to type and date; the date periods being generalised into the 11 th, 12th and 13 th centuries. The information for the classification is derived from a variety of sources; documentary evidence, fieldwork, aerial photography, topographical survey, geophysical survey, and limited excavation. The surveys and excavations that are included are original work undertaken for this study. Discussion has also been undertaken as to the social structures in the March both prior to the Norman Conquest and after the arrival of the Normans. Research is also presented with a view to questioning both the origin of the castle and the definition of the term. The research uses a certain amount of data from outside of the area including Normandy. The outcome of the research presents an interpretation of the Norman Conquest of theSouthern March of Wales.

Since 1936 National Park Service has been charged with preserving Civil War Earthworks while allowing public access. Soil erosion, both natural and human-induced, is a major concern facing the preservation of the earthworks. Currently, the National Park Service is committed to preserving these earthworks for future generations by determining which maintenance activities cause the least soil erosion. This study was undertaken to determine which management practice; burned, mowed, park-forest, forested, or trimmed, best minimized soil erosion. A secondary objective was to determine how several empirical formulas (e.g. Universal Soil Loss Equation) and one field estimate (e.g. erosion pins) compared soil erosion trends for the 5 treatments. A third objective of this study was to gather information regarding the soil development which has occurred during the 135 + years since the earthworks were constructed. Earthworks managed by prescribed burning suffered the greatest erosion rates while the forested earthworks eroded the least. The trimmed and mowed management regimes were not significantly different and would provide adequate erosion protection while the forested treatment had significantly less erosion. Based on the empirical models, erosion was primarily a function of ground cover; on the other hand, rain intensity was highly influential for erosion as measured by the erosion pins. All of the erosion estimation methods concurred that the burned treatment should be avoided due to the high erosion rates while the erosion pins indicated that the park-forest treatment could potentially have erosion problems as well. Soil profile descriptions from the earthworks revealed that A horizon depths on the earthworks were not significantly different then the A horizons found on the relatively undisturbed adjacent forest floor and that subsurface soil structure has begun to develop on earthwork soils. / Master of Science

Under the Resource Management Act 1991, the interpretation and implementation of environmental policy is primarily the responsibility of local government. The management of forestry operations may be influenced via two written means: statutory rules published in regional and district plans, and recommended best management practices (BMPs) published in guidelines. There are concerns that inconsistency between jurisdictions’ regulations have a negative impact on the forestry industry; both in terms of cost and achieving positive environmental outcomes. This research has investigated and quantified the variation in Permitted Activity rules and BMPs between the sixteen Regional Councils of New Zealand, with a focus on culvert installation and earthworks. This research quantified variation on both a national scale and between neighbouring councils. A peer review exercise was carried out to test the possible subjectivity of results, and found that an expert panel largely agreed with the results produced. It has been found that there is significant variation in these regional rules and BMPs. Variation in both the level of control, i.e., the number of rules and BMPs per council, and the nature of control, i.e., the proportion of rules or BMPs utilised, is considerable. Further, the rules and BMPs of one council are seldom the same as another. This variation is apparent on both a national scale and when considering only neighbouring pairs of councils. The findings on levels of variation between councils show that the variation is high, given that the parameters of this research excluded rules and BMPs which pertained to areas of special significance or value. As only ‘general’ rules and BMPs were examined, one would expect variation between councils to be low. The results, however, indicate that there is only limited agreement between Regional Councils. New Zealand’s resource management rules and policies regarding plantation forestry are currently under review. By highlighting the existing regional variation, this research may help to promote the need for a more consistent and effective approach to the regulation of forestry operations.

Thesis ( M.L.A.) -- University of Texas at Arlington, 2008.

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No description available.

Earthworking activities have the potential to accelerate soil erosion through vegetation clearance and soil compaction processes. The eroded sediment can have many detrimental effects on receiving aquatic environments, and thus its discharge is controlled under the Resource Management Act, 1991. Two chemically dosed sediment retentions ponds at the SH20 extension project in Mount Roskill, Auckland were investigated, and the impact of the discharge of one of these ponds on a receiving waterbody was assessed using the Stream Ecological Valuation (SEV) method. Rainfall and suspended solid data was collected for a nine month period between November 2006 and August 2007, although sampling did not commence at one of the ponds until March 2007. Two SEV samples were undertaken within the receiving waterbody; one in November 2006 and the other in November 2007 to assess environmental changes resulting from the sediment retention pond discharge. The suspended solids results measured within the sediment retention ponds during this study were much lower than those reported by other studies on earthwork sites. This is believed to be due to the effective implementation of sediment and erosion control measures onsite. The Somerset Road pond was very effective at removing suspended solids throughout the sampling period, with the majority of suspended solid removal occurring in the forebay as it typically did not become full enough to overflow into the main pond. When the forebay was full of water, the PAC dosing system resulted in large reductions in suspended solid levels over a short horizontal distance within the forebay. A smaller amount of suspended solid reduction was achieved in the main pond, predominately through dilution, with the major function of the main pond being additional storage capacity for runoff. Discharge from the Somerset Road Pond was not continuous due to low water levels in the main pond. However, when discharge did occur, the suspended solids levels were very low compared with other studies investigating sediment retention pond discharge. The Richardson Road pond was less effective at removing suspended solids due to the flow regime within the forebay. There were two runoff channels entering the forebay, as well as a continual flow of groundwater. Only one of the runoff channels was directly dosed with PAC, and as the water level in the forebay was typically at, or just below, the level spreader at all times, there was a decreased potential for the PAC to become evenly distributed through the forebay and achieve dosing of all runoff. Furthermore, the main pond discharged continuously during the study period, resulting in reduced residence times of runoff within the pond system. Nonetheless, the discharge from the main pond was much lower than other studies, implying suspended solid reduction was being achieved. The SEV method indicated that the receiving environment was already degraded due to modifications to the riparian vegetation, increased dissolved oxygen demand, and moderate bank erosion. This was reflected in the macroinvertebrate population, with only pollution tolerant taxa being collected, thus limiting the use of macroinvertebrates as an assessment tool in this study. However, the SEV method, which assesses a wide range of ecological functions, implied that very little environmental change occurred as a result of the sediment retention pond discharge. A small increase in deposited sediment was observed on the stream bed, however indications are that deposited sediment is rapidly washed away once earthworks are completed. Thus this deposited sediment may not have a permanent impact within the receiving environment.