Physical Sciences and Mathematics Commons^™

Potential Runoff Accumulation In Wheatbelt Towns Of Western Australia, Mahtab Ali, Travis Cattlin, Neil Coles, Sharam Sharafi

Resource management technical reports

Describes an analysis of flood runoff volumes from 16 small, gauged catchments in the agricultural areas of south western Australia. It also describes methods for estimating flood runoff volumes from ungauged catchments. The independent variables found to be statistically significant in explaining the variability in flood runoff volumes from the gauged catchments were catchment area, mean annual rainfall and the percentage of the catchment that was cleared. No soil factor was found to be significant.

Groundwater Study Of The Woodanilling Townsite, Ben Whitfield

Resource management technical reports

A groundwater study was carried out in the townsite of Woodanilling, Western Australia. It aimed to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, installation of a piezometer network, groundwater flow modelling and a flood risk analysis.

Groundwater Study Of The Koorda Townsite, Louise Hopgood

Resource management technical reports

A groundwater study was carried out in the townsite of Koorda. It aimed to accelerate the implementation of effective salinity risk management. The study consisted of a drilling investigation and expansion of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.

Risk Mapping For Northern Kenya And Southern Ethiopia, D. Layne Coppock

Environment and Society Faculty Publications

We used results from 120 group interviews collected in 1998 to quantify how inhabitants across northern Kenya and southern Ethiopia perceive and rank various risks to their livelihoods. We also mapped risk patterns using Global Positioning System (GPS) coordinates. Respondents recognized 15 sources of risk overall, with the most common being reliable access to food and water. Other risks were not mentioned by a majority of respondents and reflected diversity in local situations. Country of residence, wealth class, gender, and predominant means of food production (pastoralism, agro-pastoralism, and farming) influenced risk ranking. For example, wealthy males were most concerned about …

Groundwater Study Of The Mukinbudin Townsite, F Lewis

Resource management technical reports

A groundwater study was carried out in the townsite of Mukinbudin, Western Australia. The town does not currently have a salinity problem, but the future risk is not known. It aimed to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, installation of a piezometer network, groundwater flow modelling and a flood risk analysis.

Groundwater Study Of The Mullewa Townsite, Russell John Speed

Resource management technical reports

A groundwater study was carried out in the townsite of Mullewa, Western Australia. It aimed to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, installation of a piezometer network, groundwater flow modelling and a flood risk analysis.

Lort And Young Rivers Catchment : Catchment Appraisal 2001, Jamie Bowyer, Esperance Catchment Support Team (Wa)

Resource management technical reports

Using the Rapid Catchment Appraisal process, this report summarises current information for the Lort and Young Rivers Catchment, 75 kilometres west of Esperance in Western Australia. The Rapid Catchment Appraisal (RCA) process is one of the processes included in the strategy to tackle salinity and its management in Western Australia. The RCA process provides a 'snap shot' of information on the risk and impact to agricultural production and natural resources within regional geographic catchments.

Yarra Yarra Catchment : Rapid Catchment Appraisal Report 2001, M Clarke

Resource management technical reports

Using the Rapid Catchment Appraisal process, this report summarises current information for the Yarra Yarra Catchment, Northern Agricultural Region in Western Australia. The Rapid Catchment Appraisal (RCA) process is one of the processes included in the strategy to tackle salinity and its management in Western Australia. The RCA process provides a 'snap shot' of information on the risk and impact to agricultural production and natural resources within regional geographic catchments.

Groundwater Study Of The Wongan Hills Townsite, M Deshon

Resource management technical reports

A groundwater study was carried out in the townsite of Wongan Hills, Western Australia. It aimed to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, installation of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.

Groundwater Study Of The Tambellup Townsite, Ben Whitfield

Resource management technical reports

A groundwater study of the townsite of Tambellup. It aimed to accelerate the implementation of effective salinity management options. The study consisted of drilling investation and installation of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.

Groundwater Study Of The Perenjori Townsite, Russell John Speed

Resource management technical reports

A groundwater study of the townsite of Perenjori. It aimed to accelerate the implementation of effective salinity management options. The study consisted of drilling investation and installation of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.

Groundwater Study Of The Lake Grace Townsite, Damien Addison

Resource management technical reports

A groundwater study was carried out at the Lake Grace townsite to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, expansion of a piezometer network, a pumping test, groundwater flow modelling and flood risk analysis.

Groundwater Study Of The Bruce Rock Townsite, Rosemary Nott

Resource management technical reports

A groundwater study of the townsite of Bruce Rock. It aimed to accelerate the implementation of effective salinity management options. The study consisted of drilling investation and installation of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.

Groundwater Study Of The Dumbleyung Townsite, Ben Whitfield

Resource management technical reports

A groundwater study was carried out at the Dumbleyung townsite to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, expansion of a piezometer network, a pumping test, groundwater flow modelling and flood risk analysis.

Groundwater Study Of The Dowerin Townsite, Louise Hopgood

Resource management technical reports

A groundwater study was carried out for the townsite of Dowerin with the aim of accelerating the implementation of effective salinity management options.

Groundwater Study Of The Kellerberrin Townsite, T Cattlin

Resource management technical reports

A groundwater study of the townsite of Kellerberrin. It aimed to accelerate the implementation of effective salinity management options. The study consisted of drilling investation and installation of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.

Groundwater Study Of The Moora Townsite, M Deshon

Resource management technical reports

A groundwater study of the townsite of Moora. It aimed to accelerate the implementation of effective salinity management options. The study consisted of drilling investation and installation of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.

African Black Beetle In Vineyards, Diana Fisher, Stewart Learmonth

Bulletins 4000 -

The African black beetle, Heteronychus arator, is an important pest of horticultural crops, ornamentals and pastures in Western Australia. They also attack lawns and are commonly referred to as the black lawn beetle. This beetle was first recorded in Australia during the 1920s and originates from southern Africa where it is a major establishment pest of maize.

Groundwater Study Of The Beacon Townsite, F Lewis

Resource management technical reports

A hydrogeological investigation and a flood risk analysis were carried out for the town of Beacon with the aim of accelerating the implementation of effective salinity management options.

Groundwater Study Of The Narembeen Townsite, Rosemary Knot

Resource management technical reports

A groundwater study was carried out for the townsite of Narembeen with the aim of accelerating the implementation of effective salinity management options.

Groundwater Study Of The Bakers Hill Townsite, Damien Addison

Resource management technical reports

A groundwater study was carried out for the townsite of Bakers Hill with the aim of accelerating the implementation of effective salinity management options. The study consisted of a drilling investigation and installation of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.

Groundwater Study Of The Wagin Townsite, Edward K. Crossley

Resource management technical reports

A groundwater study was carried out for the townsite of Wagin with the aim of accelerating the implementation of effective salinity management options.

Organic Grapes And Wine : A Guide To Production, Gerry Parlevliet, Steven Mccoy

Bulletins 4000 -

The tastebuds, health concerns and environmental conscience of affluent consumers are demanding more organically grown food than producers worldwide can supply. Growing consumer concerns about the effects of synthetic chemical pesticides and fertilisers on human health and the environment have boosted world trade in organic products by a rate of about 20-30 per cent a year for the past 10 years. World trade was estimated to be worth $US 21.6 billion in 2000 and is expected to reach US$100 billion by the year 2006.

The Australian market for organic products alone is valued at $200-$250 million - with exports estimated …

Scott Coastal Plain A Strategy For A Sustainable Future, Department Of Agriculture And Food, Western Australia

Bulletins 4000 -

The Scott Coastal Plain has significant attributes that make it an area of State and regional significance for agricultural production. The climate, availability of good quality groundwater for irrigation, and large lot sizes provide opportunities for mechanised horticultural production which other parts of the State may not have.

An estimate of the area that could be used for each agricultural land use has been developed, at a broad study area level. The figures presented in this report show that diversified production combining tree plantation and/or irrigation (cropping or hay/silage) with grazing enterprises provides for potential increases in gross margins and …

Groundwater Study Of The Pingelly Townsite, Edward K. Crossley

Resource management technical reports

A groundwater study was carried out in the townsite of Pingelly, Western Australia. It aimed to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, expansion of a piezometer network, groundwater flow modelling and a flood risk analysis.

Intensification In A Risky Environment: The Case Of Improving Private Grazing Land For Beef Production In Utah, Louise D. Sainsbury

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah ranchers commonly face risks to their livelihoods. The objective of this work was to determine if ranchers could make profitable improvements to private land forage given the combined threat of low beef prices, drought, and possible loss of public grazing.

We used linear programming (LINDO) to identify the most profitable solutions for private land investment with an 11-year simulation. Operations were divided into small, medium, and large size classes. Various forage improvements and public permits were options. Two phases of a beef price cycle (peak and trough) and 2 precipitation patterns (wet and drought) were combined as joint favorable …

Groundwater Study Of The Piawaning Townsite, Russell John Speed, Ali S. Mahtab

Resource management technical reports

A groundwater study was carried out in and around the townsite of Piawaning. It aimed to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, expansion of a piezometer network, a pumping test and a flood risk analysis.

Another Look At Clark's Adit-Silver Series, David W. Meek

Conference on Applied Statistics in Agriculture

The empirical semivariogram for Clark's adit-silver series has been the subject of several publications. Its use in the literature along with some other discussed considerations makes this series a suitable selection for a classroom or workshop semivariogram modeling exercise. My emphasis in this exercise is on estimating the scale of fluctuation (8). Alternative unbounded, bounded asymptotic, and bounded transitional models are developed via weighted least-squares estimation for both regular and integral semivariogram parameterizations (ISV). Results are compared with Clark's recommendation along with some other traditional models, nonparametric models, and ad hoc numerical methods. When a given model fits well using …

An Uncertainty Analysis Procedure For Spatially Joint Simulations Of Multiple Attributes, Shoufan Fang, Guangxing Wang, George Z. Gertner, Alan Anderson

Conference on Applied Statistics in Agriculture

In this study, an uncertainty analysis procedure for joint sequential simulation of multiple attributes of spatially explicit models was developed based on regression analysis. This procedure utilizes information obtained from joint sequential simulation to establish the relationship between model uncertainty and variation of model inputs. Using this procedure, model variance can be partitioned by model input parameters on a pixel by pixel basis. In the partitioning, the correlation of neighboring pixels is accounted for. With traditional uncertainty analysis methods, this is not possible. In a case study, spatial variation of soil erodibility from a joint sequential simulation of soil properties …

Comparison Of Sas Proc Nlin And Nlmixed For Parameter Estimation In Pet Model, Y. Xie, A. M. Parkhurst, T. L. Mader, J. B. Gaughan

Conference on Applied Statistics in Agriculture

Cattle body temperatures were measured under semi-controlled hot cyclic chamber temperatures. The four-parameter nonlinear PET model, is used to estimate body temperature in cattle challenged by heat stress. For each steer, the parameters can be estimated by the Nlin procedure and the sensitivity of each animal can be studied. It is also desirable to generalize the results by using the Nlmixed procedure to combine both the fixed and random effects. When comparing the results from the two procedures, we found heterogeneity among animals and/or days caused convergence problems for proc Nlmixed. Simulation studies were used to study how deviations from …