Laboratory and Statistical Methods for Estimating Soil Erosion on Al-Jabal Alkhdar Slopes

Murad M.  Aburas; Ahmed Y. Habel; Asama S.  Alferjani

doi:10.59743/jmset.v5i2.54

Authors

Murad M. Aburas Soil and Water Department, Faculty of Agriculture, Omar Al-Mukhtar University, Albeida, Libya.
Ahmed Y. Habel Soil and Water Department, Faculty of Agriculture, Omar Al-Mukhtar University, Albeida, Libya.
Asama S. Alferjani Soil and Water Department, Faculty of Agriculture, Omar Al-Mukhtar University, Albeida, Libya.

DOI:

https://doi.org/10.59743/jmset.v5i2.54

Keywords:

Al-Jabal Alkhdar, Soil erosion, Soil properties, Libya

Abstract

The study applied some dynamic laboratory methods to estimate soil susceptibility to water erosion. Non-dynamic laboratory methods such as statistical methods were also applied. Tests were carried out on topsoil samples (0-10 cm) collected from five sites located on the semi-arid southern slopes of Al-Jabal Alkhdar: Meseliba (Taknes); Marawa; Sirat Alia (Gandulah), Grehat (Gandulah), and Qasar Mestashi (Salantah). The results showed compatibility between the results of all the dynamic methods, which showed that the soil of Qasar Mestashi is the most susceptible to erosion, which corresponds to the deterioration of its physical and hydraulic properties and the low content of organic matter. It was also found that the soil of the Sirat Alia area was the least erosive, which corresponds to the high content of clay, organic matter, and soil water-stable aggregates. On the other hand, the statistical method using the K-USLE nomograph (diagram) did not succeed in producing results consistent with the dynamic laboratory methods, the K-USLE nomograph results unexpectedly showed that the soil of Grehat is relatively the most susceptible to erosion, although these soils have a good content of clay, organic matter, and soil water-stable aggregates. The high content of silt at Grehat soils could be the reason for the high susceptibility estimation when the statistical method is applied. Accordingly, the variance in the results of statistical methods is expected due to the slight changes in the soil fractions, which raises doubts about the efficiency of statistical methods in providing a reliable characterization of soil susceptibility to water erosion. Dynamic laboratory methods were the closest to soil characteristics and field conditions, which could make them more realistic and reliable indicators as low-cost and easy-to-apply methods, and contribute to more efficient erosion measurement at Al-Jabal Alkhdar region.

References

Abu Hammad A.H., Lundervam H., and Berresen T. (2005). Adaptation of RUSLE in the Eastern part of the Mediterranean Region. Environmental Management, 34(6): 829-841.

Aburas M.M. (1997). The effects of vegetation removal for agricultural purposes on soil loss and properties, Al-Jabal Alkhdar, Libya. M.Sc. thesis, Omar Al-Mukhtar University, Libya (In Arabic)

Aburas M. (2009). Assessment of Soil Erodibility in Relation to Soil Degradation and Land Use in `Mediterranean Libya. PhD thesis, University of Newcastle upon Tyne, UK.

Adams J.E., Kirkham D., and Scholtes W.H. (1958). Soil erodibility and other physical properties of some Iowa soils. Iowa State College Journal of Science, 32(4): 485-540.

Barthès B., and Roose E. (2002). Aggregate stability as an indicator of soil susceptibility to runoff and erosion; validation at several levels. CATENA, 47(2): 133-149.

Barthes B., Azontonde A., Boli B.Z., Part C., and Roose E. (2000). Field-scale run-off and erosion in relation to topsoil aggregate stability in three tropical regions (Benin, Cameroon, Mexico). European Journal of Soil Science, 51: 485-496.

Cerda A. (2000). Aggregate stability against water forces under different climates on agriculture land and scrubland in southern Bolivia. Soil and Tillage Research, 57(3): 159-166.

Combeau A., and Monnier G. (1961). Methods d,etude de la stabilite structural. Application aux sols tropicaux.

Diaz-Fierros F., and Benito E. (1996). Rainwash erodibility of Spanish soils. in Rubio, J. L. C., A(ed), Soil degradation and desertification in Mediterranean environments. Logrono, Spain: Geoforma Ediciones, pp. 91-105.

Ekwue E.I. (1984). Experimental investigation on the effect of preparation of soil samples on measured values of soil erodibility. M.Sc. Thesis, Cranfield Institute of Technology, Silso College, UK.

FAO (1969). Report to the government of Libya on development on tribal lands settlement project. FAO, Rome (SF 20).

Gebril M.A. (1995). Water erosion on the northern of Al-Jabal Alkhdar of Libya. PhD thesis, Durham University, UK.

GEFLI. (1975). Study of soil and water conservation in Jabal Lakhdar, Libya. Final report.

Goldsmith P.F. (1977). A practical guide to the use of the universal soil loss equation. Published BAI Tech. Monogr, pp: 34.

Hussein M.H., Kariem T.H., and Othman K. (2007). Predicting soil erodibility in northern Iraq using natural runoff plot data. Soil and Tillage Research, 94(1): 220-228.

Kemper W.D., Trout T.J., Brown M.J., and Rosenau R.C. (1985). Furrow erosion and water and soil management. Transactions of the ASAE, 28(5): 1564-1572.

Kuhn N.J., and Bryan R.B. (2004). Drying, soil surface condition and interrill erosion on two Ontarion soils. Catena, 57(2): 113-133.

Lal R. (2001). Soil degradation by erosion. Land degradation & Development, 12(6): 519-539.

Lama M. (1996). Desertification in Benghazi plain, geographic study in causes and characteristics. PhD thesis, Faculty of Arts, University of Cairo, Egypt. (In Arabic)

Le Bissonnais Y. (1996). Aggregate stability and assessment of soil crustability and erodibility: I. Theory and methodology. European Journal of Soil Science, 47(4): 425-437.

Le Bissonnais Y., and Arrouays D. (1997). Aggregate stability and assessment of soil crustability and erodibility: II. Application to humic loamy soils with various organic carbon contents. European Journal of Soil Science, 48: 39-48.

Le Bissonnais Y., Blavet D., De Noni G., Laurent J.Y., Asseline J., and Chenu C. (2007). Erodibility of Mediterranean vineyard soils: relevant aggregate stability methods and significant soil varia-bles. European Journal of Soil Science, 58(1): 188-195.

Mathilde S., and Alexandra B. (2002). Proposed indicators for land degradation assessment of drylands. LADA Conference of Properties and Management of Drylands, 9th Oct.-4th of Nov.. Proposed indicators for land degradation assessment of drylands: Land and water Development Division, FAO, Italy.

Morgan R.P.C. (1996). Soil Erosion and Conservation. Addison Wesley Longman Limited, UK.

Romkens M.J.M. (1985). Soil erodibility: a perspective. In El-Swaify S.A., Moldenhauer W.C, and Lo A. (ed.), Soil Erosion and Conservation. Soil and Water Conservation Society, Ankeny, Iowa, USA.

Roose E. (2002). Evaluating Monitoring and Forecasting Erosion. 12th ISCO Conference, Beijing, China.

Russell M.B., and Feng C.L. (1947). Characterization of the stability of soil aggregates. Soil Science, 63(4): 299-304.

Selkhoze Prom E. (1980). Soil studies in the eastern zone of Libya. Secretariat of agriculture, Libya.

Saad M.A. (2006). Desertification at the south of Al-Jabal Alkhdar: Geographical study, the causes and characteristics. M.Sc thesis, Garyounis University, Libya. (In Arabic)

Stocking M.A., and Murnaghan N. (2001). Handbook for the field assessment of land degradation. Earthscan Publications Ltd., UK.

Wischmeier W.H., Johnson C.B., and Cross B.V. (1971). A soil erodibility nomograph ` for farmland and construction sites. Journal of Soil and Water conservation, 26: 189-193.