Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Institution
Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
Sustainable Grazing On Saline Land In Western Australia - Multidisciplinary Research Linking Producers And Scientists, Hayley C. Norman, D. G. Masters, M. G. Wilmot, A. J. Rintoul, R. Silberstein, E. Lefroy, T. York
Sustainable Grazing On Saline Land In Western Australia - Multidisciplinary Research Linking Producers And Scientists, Hayley C. Norman, D. G. Masters, M. G. Wilmot, A. J. Rintoul, R. Silberstein, E. Lefroy, T. York
IGC Proceedings (1997-2023)
Dryland salinity is one of the most critical environmental issues challenging Western Australian farmers. Currently 10% of the cropping zone (1.8 million ha) is salt-affected and this is predicted to increase dramatically in the next 50 years (NLWRA, 2001). Animals grazing saline pasture systems represent the most likely large-scale opportunity for economic return from saline land in the short to medium term. To date, few farmers have invested in large-scale revegetation of saline land as the economic return from grazing has not been perceived to cover costs. Furthermore other benefits of saltland pasture systems, such as biodiversity, water use and …
Estimating Supraglacial Melt Lake Volume Changes In West Central Greenland Using Multiple Remote Sensing Methods, Wesley Rancher
Estimating Supraglacial Melt Lake Volume Changes In West Central Greenland Using Multiple Remote Sensing Methods, Wesley Rancher
Student Symposium
The Greenland Ice Sheet (GrIS) is losing ice mass as the climate warms. Supraglacial melt lakes (SGLs), which are present in the ablation (melt) zone of the GrIS are found to be responsive - and reinforce - changes in glaciological and climatological dynamics. Developing a spatiotemporal model to monitor lake volume change throughout the melt season (late-April through September) can enhance our understanding of subsequent GrIS changes. Supraglacial melt lakes accumulate in volume and in some cases drain to the ice sheet base during the melting season. In this study we utilize Landsat satellite imagery paired with high resolution digital …
Fine Colloids ‘Carry’ Diffuse Water Contaminants From Grasslands, P. M. Haygarth, A. L. Heathwaite
Fine Colloids ‘Carry’ Diffuse Water Contaminants From Grasslands, P. M. Haygarth, A. L. Heathwaite
IGC Proceedings (1997-2023)
The transport of diffuse pollutants from grassland has traditionally been described by the operationally defined threshold of greater, or smaller than a nominated membrane filter size. Most commonly this has been a 0.45 μm threshold to define ‘solute’ and ‘particulate’ transport. In this paper we shall use phosphorus (P) to help provide an example of the importance of colloid-facilitated transport.
The Cottonwood Ranch Riparian Management Case Study, Sherman Swanson, Kent Mcadoo, Agee Smith, Sandra Wyman
The Cottonwood Ranch Riparian Management Case Study, Sherman Swanson, Kent Mcadoo, Agee Smith, Sandra Wyman
IGC Proceedings (1997-2023)
No abstract provided.
Assess Physical Functioning Of Riparian Systems With An Eye Toward Management, Sherman Swanson, Sandra Wyman, Kent Mcadoo
Assess Physical Functioning Of Riparian Systems With An Eye Toward Management, Sherman Swanson, Sandra Wyman, Kent Mcadoo
IGC Proceedings (1997-2023)
No abstract provided.
Calibration Optimization Of A Stream Temperature Model Applied To The Nooksack River, Ian Edgar
Calibration Optimization Of A Stream Temperature Model Applied To The Nooksack River, Ian Edgar
Scholars Week
The River Basin Model (RBM) is used to assess how stream temperatures will change in the Nooksack River due to warming climates by tracking heat exchanges along stream segments. Before modeling forecasted climate scenarios, I first calibrated the model to observed historical stream temperatures. The calibration of the RBM to a stream network involves the adjustment of eleven different variables until the simulated temperatures match observed historical stream temperatures. Because the manual process of calibrating the model is extremely time consuming, I developed a Python script to converge on the optimal variables required for the RBM calibration. The script adjusts …
Grain Size Analysis Of Massie’S Creek Near Flax Pond And Community Park, Andrew R. Rivera
Grain Size Analysis Of Massie’S Creek Near Flax Pond And Community Park, Andrew R. Rivera
The Research and Scholarship Symposium (2013-2019)
The goal of this research is to better understand the stream bed conditions at the confluence of North Fork and South Fork Massie’s Creek next to Community Park in downtown Cedarville, OH. Stream depth as well as sediment type where determined as a result of field work done for this project. The depth data was then used to create a contour map of the pool behind the low-head dam that defines the lower boundary of the confluence area. Sediment distribution is represented on this map based on laboratory particle size analysis and gross piratical size analysis done in the field. …
Three-Dimensional Deformable Pore Networks, Jack W. Conrad, Laura J Pyrak-Nolte
Three-Dimensional Deformable Pore Networks, Jack W. Conrad, Laura J Pyrak-Nolte
The Summer Undergraduate Research Fellowship (SURF) Symposium
Porous structures in materials play a part in many areas of research and development. A couple of examples of this are extraction of water through aquifers and oil through fracking processes. Current understanding of the small scale fluid-fluid interactions in the structure of these porous materials stops at data of the two dimensional interface between the two fluids. This experiment aimed to create three dimensional, transparent, deformable micro-models which are expected allow us to obtain three dimensional data sets of the capillary pressure–saturation–interfacial area per volume relationship. The micro-models were synthesized using a grain deposition technique. Grains were formed using …
Hydrological Normalization Of Nutrient Deliveries From Agricultural Catchments, Per Stalnacke, Anders Grimvall
Hydrological Normalization Of Nutrient Deliveries From Agricultural Catchments, Per Stalnacke, Anders Grimvall
Conference on Applied Statistics in Agriculture
Nutrient deliveries from agricultural catchments are strongly influenced by natural fluctuations in water discharge. Hydrological normalization of such data may therefore facilitate estimation of human impact on the environment. In the present study, we compared conventional statistical normalization techniques with a recently proposed, semi-parametric regression technique, which can accommodate time-dependent relationships between nutrient deliveries and water discharge. Case studies of agricultural catchments in Sweden and Norway demonstrated that all of the tested normalization techniques were able to remove a substantial fraction of the interannual variation in nitrogen deliveries, whereas normalization of phosphorus loads was problematic. Semi-parametric regression models were found …