Determination of Effective Factors in Gullies Development in Modares Watershed of Shushtar

آب و خاک

Article 7, Volume 31, Issue 5 - Serial Number 55, November 2018, Pages 1432-1446   

Document Type: Research Article

DOI: 10.22067/jsw.v31i5.63329

Authors

Freidoon Soleimani^{* 1}; Majid Soufi²; Aziz Arsham¹

¹Khuzestan Agricultural and Natural Resources Research and Education Center

²Fars Agricultural and Natural Resources Research and Education Center

Abstract

Introduction: Khuzestan province with 4.6 million hectares area has suitable agricultural lands that gully erosion destroyed some parts of them. One of the major basins in which much of its agricultural land threatened by gully erosion is located in Modarres watershed of Shushtar. Gully erosion progression in this basin causing the loss of farmland and thus the farmers are leaving farming and consequently would lead to poverty and migration to urban areas and social consequences. Therefore, presenting a model to determine the factors that impact on gully erosion and erosion hazard zonation for conserving and stability of the land need to research and investigate on gullies of Khuzestan province.
Materials and Methods: Study area is located in Shahid Modares basin that large parts of these farm lands destroyed by gully erosion. The aim of this project is to identify the main factors affecting on linear gully development and modeling them. For this purpose, distribution maps of climate and the gully was determined. Then a Watershed from each climate class with the highest losses was selected. At last Haddam watershed with warm-arid climate and Sharif watershed with warm-semi arid climate were selected. And 15 gullies were selected from each watershed then some parameters studied and measured in these gullies. Finally relationship between the length and volume development of gully with watershed characteristics, Physio-chemical soil properties, the percentage of vegetation cover, pebbles, bare soil, litter, slope and upstream area of head cuts, rainfall and different land use area a 20-year period (1993-2012) were analyzed. Modeling of the gully development was done using multivariate regression.
Results and Discussion: The results showed that in Haddam watershed the gully number A17 had most elongation (78.8 meters) while the gully number B2 had lowest elongation (3.8 meters). In Sharif watershed the gully number B3 had the most elongation (108.1 meters) while the gully number B4 had the lowest elongation (1993-2012). Gully clustering results showed that gullies of Haddam’s watershed were in two clusters and gullies of Sharif’s watershed in the three clusters. The final equation for the development of Haddams gullies in the cluster one shows the amount of development in these gullies depends on three variables including upstream area of initial point (X4), the percentage of bare soil (X6) and slope of initial point (X2). At cluster two the amount of progress in these gullies depends on silt percent (X18) and PH(X23). The final equation for the development of Sharif’s gullies in the cluster one shows the amount of progress in these gullies depends on upstream area of head cut(X3). At cluster two the amount of development depends on two variables upstream area of initial point (X4) and Sodium content (X22). In Haddam’s watershed more than 80 percent of land use is covered by rain fed and irrigated land. Unlike Sharif’s watershed that more than 80 percent of pasture land form. In addition, measurement of upstream watershed area reflects very poor range condition. In this region, due to the slight slope in gully head cut the surface runoff has not velocity but also due to lack of canopy cover in gullies’ watershed and low soil permeability because of silt frequency and high salinity in the soil profile increases the risk of gully development. In this research, slope of head cut upstream and slope of initiates point is less than 5 percent at total gullies that are correlated with development of gully elongation. However, due to poverty and lack of vegetation cover conditions provided for gully linear growth.
Conclusions: Gully erosion is a form of progressive erosion that allocated the largest portion of soil degradation in different climates to itself. Gullies behavior against its spreading and growth is affected by different environmental factors. In this research, available data analysis in Haddam’s watershed showed that the most important factors on the gully development were watershed characteristics on gully headcut (area and slope), the fine geological formation (silt), acidity and high soil salinity. These factors along with poor vegetation cover and agricultural land had created an excellent platform for gully elongation so that over a 20 year period have at least 3.8meter per year and a maximum elongation 78.8 m. In Sharif ‘s watershed showed that the most important factors on gully development were upstream area of head cut, upstream area of initiate pointed amount of sodium which caused to 10.1 and 108.1 meters minimum and maximum linear development respectively.

Keywords

Cluster analysis; Haddam and Sharif Watershed; Gully Clustering; Gully erosion

References

1- Abedini M. 2005. Research in gully erosion of West Plain Hadishahr southern highlands (North West Azarbaijan) through methods and new techniques. Geography and Development Iranian Journal, 3(6):93-113. (in Persian)

2- Ahmadi H., and Mohamadi A. 2008. Gully land management and modeling through analysis of impact factors to determine the gully longitudinal growth potential (case study: Hableh Rood basin). 4th national conference on watershed management. Faculty of natural resources. University of Tehran. Karaj. Iran.

3- Bayati Khatibi M. 2006. Gully characteristics and factors controlling the gullying processes. Geography and Development Iranian Journal, 4(7):115-137. (in Persian)

4- Bou Kheir R., Wilson J., and Deng Y. 2007. Use of terrain variables for mapping gully erosion susceptibility in Lebanon. Earth Surface Processes and Landforms, 32(12): 1770–1782.

5- Carey B., Gray J., and Seagrave C. 2001. Gully erosion, The State of Queensland, Department of Natural Resources and Mines.

6- Evans R. 1980. Mechanics of water erosion and their spatial and temporal controls: an empirical view point. In Kirkby M.J., Morgan R.P.C., (Eds.). Soil erosion. Chichester, Wiley, 109-128.

7- Geyik M.P. FAO watershed management field manual gully control. No. 13/2. Translated by Abbasi. 2002. Registered 421/81.

8- Gomez Gutierrez A., Schnabel S., and Lavado Contador F. 2009. Gully erosion, land use and topographical thresholds during the last 60 years in a small rangeland catchment in SW Spain. Land Degradation & Development, 20(5):535–550.

9- Karimi M., Vali Samani J., and Ghodousi J. 2007. Investigation of effective factors on gully erosion and predicting of longitodinal growth. 10th national Congress on Soil Science. Iran. Karaj. (in Persian)

10- Malik Ireneusz. 2007. Dating of small gully formation and establishing erosion rates in old gullies under forest by means of anatomical changes in exposed tree roots (Southern Poland).pp:41-82.

11- Martinez-Casasnovas J.A., Concepcion Ramos M., and Garcia-Hernandez D. 2009. Effects of land-use changes in vegetation cover and sidewall erosion in a gully head of the Penedès region (northeast Spain). Earth Surface Processes and Landforms, 34 (14):1927–1937.

12- Mehrjerdi Z., Soufi M., and Choupani S. 2007. Investigation of effective factors on gully erosion in Griz region of Hormozgan Province. 10th national Congress on Soil Science. Iran. Karaj. (in Persian)

13- Meyer A., and Martinez-Casasnovas J.A. 1999. Prediction of existing gully erosion in vineyard parcels of the NE Spain: a logistic modelling approach. Soil and Tillage Research, 50(3-4):319-331.

14- Moghimi E., and Ghodsi M. 2014. Study the inter put environmental parameters affecting on gully formation and development. Watershed Management Research(Pajouhesh & Sazandegi), 27(2):113-122. (in Persian with English abstract)

15- Morgan P., and Mngomezulu D. 2003. Threshold condition for initiation of valley-side gullies in the middle veldt of Swaziland. Catena, 50:401-414.

16- Mortezaei Gh., Ahmadi H., Ghodousi J., Feiznia S., and Jafari M. 2008. Evaluation of the quantitative effects of environmental parameters on occurance of gully erosion. Journal of the Iranian Natural Resources, 60(4): 1211-1223. (in Persian with English abstract)

17- Nachtergaele J., Poesen J., Oostwoud Wijdenes D., and Vandekerckhove L. 2002. Medium-term evolution of a gully developed in a loess-derived soil. Geomorphology, 46(3-4):223-239.

18- Nazari Samani A., Ahmadi H., Jafari M., Boggs G., Ghoddousi J., and Malekian A. 2009. Geomorphic threshold conditions for gully erosion in Southwestern Iran (Boushehr-Samal watershed). Journal of Asian Earth Sciences, 35(2):180-189.

19- Nazari Samani A., Ahmadi H., Mohammadi A., Ghoddousi J., and Salajegheh A. 2010. Factors controlling gully advancement and models evaluation (Hableh Rood Basin, Iran). Water Resources Management, 24(8):1531-1549.

20- Nourmohamadi F. 2006. Alometry and gully sediment yield of Darreh Shahr- Ilam province. Thesis of M.Sc. in watershed management. Tarbiat Moddares University. 74p.

21- Richter G., and Negendank J. 1977. Soil erosion processes and their measurement in the German area of the Moselle River. Earth Surface Processes 2: 261-278.

22- Rostamizad Gh., Salajegheh A., Nazari Samani A., and Ghodousi J. 2015. Determination of effective factors on longitudinal growth of gullies and prediction of its development. Journal of Quantitative Geomorphological Researches, 4(1):46-58. (in Persian)

23- Servati M., Ghodousi J., and Dadkhah M. 2008. Factors effecting initiation and advancement of gully erosion in loesses. Pajouhesh & Sazandegi, 78:20-33. (in Persian with English abstract)

24- Shahini Gh., and Charkhabi A. 2007. The relationship between gully erosion and watershed characteristics and soil in loess hills north of Gorgan. 10th national congers of soil science. Agriculture and natural resources campus. University of Tehran. Karaj. Iran.

25- Soil Science Society of America. 2001. Glossary of soil science terms, Madison, WI, http.//www.soils.org/sssagloss.

26- Soleimanpour M., Soufi M., and Ahmadi A. 2010. A study on the topographic threshold and effective factors on sediment production and gully development in Neyriz, Fars Province. Iranian Journal of Natural Resources(Range and Watershed Management), 63(1):53-41. (in Persian with English abstract)

27- Verachtert E., Van Den Eeckhaut M., Poesen J., and Deckers J. 2010. Factors controlling the spatial distribution of soil piping erosion on loess-derived soils: A case study from central Belgium. Geomorphology, 118(3-4):339-348.

28- Zareh Chahooki M.A. 2010. Data analysis in natural resources researches using SPSS. Tehran University Press. 310 p.

29- Zinck A., Lopez J., Metternich G.I., Shrestha D.P., and Vazqez-Selem L. 2001. Mapping and modelling mass movement and gullies in montainous areas using remote sensing and GIS techniques. International Journal of Applied Earth Observation and Geoinformation, 3(1):44-53.