Wind Erosion in Western Queensland Australia

More documents

Recommendations

Info

Chapter 3 – Modelling Land Erodibility Review2001; Zender et al., 2003a). This approach is surprising considering the diverse spatial scalesat which wind erosion models have been developed to operate. It reflects difficulties inobtaining measurements of wind erosion activity over large areas, and also inherentdifficulties associated with obtaining representative measurements of a spatio-temporallydynamic process. Global scale studies of dust transport are increasingly comparing modeloutputs with remotely sensed data on aerosol optical thickness to obtain spatial assessmentsof model performance (e.g. Mahowald et al., 2003a; Ginoux et al., 2004).Validation of the model components is generally considered during their development(individually) or through validation of the complete wind erosion models (e.g. Marticorenaand Bergametti, 1995). Explicit validation of model assessments of u *t have not beenreported. This reflects the fact that, despite the potential for doing so, the models have notbeen applied to assess land erodibility.3.6 SummaryThis chapter has presented a review of approaches for representing land erodibility in winderosion models. The review has covered empirical and mechanistic models that have beenapplied to quantify soil loss and dust emission from the field to global scales. The chapter hasreviewed limitations to wind erosion modelling, including: the availability of robust modelsto predict temporal variations in soil erodibility; the availability of suitable model input data;a requirement for robust methods to upscale models and account for sub-grid scaleheterogeneity in soil and vegetation conditions; and a reliance on validating models at smallpoint scales or very coarse resolutions due to a lack of data available to test the performanceof models at intermediate (landscape to regional) scales. Most notably, and despiteconsiderable modelling efforts, there has been a significant lack of research that seeks toapply models to assess spatial and temporal patterns in the susceptibility of landscapes towind erosion. This is essential for accurately assessing spatial and temporal patterns in landerodibility, particularly in rangeland environments.Considerable effort has been directed toward scaling issues associated with broad-scalespatial modelling (see Raupach and Lu, 2004; Shao, 2000) and dealing with sub-grid scaleheterogeneity (e.g. Okin, 2008). Priority must therefore be given to addressing gaps in96
Chapter 3 – Modelling Land Erodibility Reviewlandscape scale research to map and monitor land susceptibility to wind erosion. This can beachieved by:• Developing models to predict temporal changes in soil surface conditions like surfacecrusting and aggregation that control soil erodibility.• Developing models to assess land erodibility and wind erosion at the landscape scale.• Developing field methods to assess land erodibility and wind erosion that can be appliedto collect data for use in validating spatially distributed models at the landscape scale.• Applying models to learn more about spatial and temporal patterns in land erodibility andlandscape responses to climate variability and land management pressures.The following chapters of this thesis systematically address these research requirements.97
Page 1:
Modelling Land Susceptibility toWin
Page 4:
AUSLEM was developed as a Geographi
Page 8 and 9:
who joined me on many trips, shared
Page 10 and 11:
Conference Presentations by the Aut
Page 12 and 13:
2.2.5 Soil Moisture Effects........
Page 14 and 15:
Chapter 6: Assessing Land Susceptib
Page 16 and 17:
List of FiguresChapter 1: Introduct
Page 18 and 19:
Figure 2.11 Conceptual model of lan
Page 20 and 21:
hand column) presents trajectories
Page 22 and 23:
List of TablesChapter 1: Introducti
Page 24 and 25:
xxii
Page 26 and 27:
Chapter 1 - Introduction• The abi
Page 28 and 29:
Chapter 1 - Introductionchapter the
Page 30 and 31:
Chapter 1 - Introductionevents yr -
Page 32 and 33:
Chapter 1 - IntroductionFigure 1.2
Page 34 and 35:
Chapter 1 - Introductionsusceptibil
Page 36 and 37:
Chapter 1 - Introductiontemporal pa
Page 38 and 39:
Chapter 1 - Introduction1.5 Researc
Page 40 and 41:
Chapter 1 - IntroductionFigure 1.3
Page 42 and 43:
Chapter 1 - IntroductionMitchell Gr
Page 44 and 45:
Chapter 1 - IntroductionSimpson-Str
Page 46 and 47:
Chapter 1 - IntroductionDowns. Wind
Page 48 and 49:
Chapter 1 - IntroductionChapter 2 p
Page 50 and 51:
Chapter 2 - Land Erodibility Contro
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71: Chapter 2 - Land Erodibility Contro
Page 93 and 94: Chapter 3 - Modelling Land Erodibil
Page 119: Chapter 3 - Modelling Land Erodibil
Page 124 and 125: Chapter 4 -Modelling Soil Erodibili
Page 154 and 155: Chapter 5 - Land Erodibility Model
Page 170 and 171:
Chapter 5 - Land Erodibility Model
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Chapter 6 - Field Assessments and M
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Chapter 7 - Land Erodibility Dynami
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Chapter 8 - Conclusions• There is
Page 216 and 217:
Chapter 8 - ConclusionsThe third ai
Page 218 and 219:
Chapter 8 - Conclusionswas shown to
Page 220 and 221:
Chapter 8 - Conclusionsland use cha
Page 222 and 223:
Chapter 8 - Conclusionsmodels are n
Page 224 and 225:
Chapter 8 - Conclusionsmultiple ass
Page 226 and 227:
Chapter 8 - Conclusionsthe opportun
Page 228 and 229:
Beadle, N.C.W., 1945. Dust storms.
Page 230 and 231:
Bryan, R.B., Govers, G., Poesen, J.
Page 232 and 233:
Chepil, W.S., 1965. Transport of so
Page 234 and 235:
Fryrear, D.W., Sutherland, P.L., Da
Page 236 and 237:
Gregory, J.M., 1984. Prediction of
Page 238 and 239:
Hugenholtz, C.H., Wolfe, S.A., 2005
Page 240 and 241:
Littleboy, M., McKeon, G.M., 1997.
Page 242 and 243:
Marshall, J.K., 1973. Drought, land
Page 244 and 245:
Assessment Report of the Intergover
Page 246 and 247:
Penner, J.E., et al. , 2001. Climat
Page 248 and 249:
Rickert, K.G., McKeon, G.M., 1982.
Page 250 and 251:
Stokes, C., J., McAllister, R.R.J.,
Page 252 and 253:
Williams, W.J., Eldridge, D.J., Alc
show all

Wind Erosion in Western Queensland Australia

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?