Erosion Hazard Index Methodology (EHIM) for Streams Erodibility Assessment (Ardabil-Province)


1 Scientific Member of the Center Of Agriculture and Natural Resources of Ardabil, Ardabil, IRAN

2 Researcher of the Research Center of Agriculture and Natural Resources of Ardabil, Ardabil, IRAN

3 Scientific Member of the Research Center of Soil Conservation and Watershed Management, Tehran, IRAN


An erosion hazard index methodology (EHIM) was developed for assessing stream erosion. The index of stream erosion is designed as a management tool. Assessing stream erosion involves consideration of a range of aspects of streams and a value judgment about a desirable state. The assessment of the erosion indicators of streams was based on a state-wide assessment of physical stream condition. A scale from 0 to 100 was chosen as a basis for ranking where an erosion hazard index (EHI) of 100 indicates the very extensive possible erosion state and one of zero the stable or no erosion possible erosion state. In the EHIM five steps are necessary for calculation: to measure and select of basic and additional indicators, to calculate sub-EHIi for all selected indicators, to determine weighting factors for all selected indicators, to calculate a synthetic EHI using the sub-EHIi and weighting factors for all selected indicators and final step: to assess stream erosion based on synthetic EHI values. The EHIM was applied to a 378 number of Ardabil Province (NW of IRAN) for assessment and comparison purposes. Length of stream erosion (LE) was selected to serve as a basic indicator, while erosion susceptibility of lithology (LESi), length of streams with lateral erosion (LLAE), length of streams with bed erosion (LB), the plant cover and human impacts (LAHE), pasture lands (LPE) and their relationships and discharge of floods (Q2.33) were used as additional indicators. The results suggest that the EHIM is a valuable relatively uncomplicated methodology with simple principles, ease of calculation, reliable and intuitive results. As a practical planning tool, it can be widely used for the quantitative assessment and comparison of stream erosion states for a series of different streams or more complicated stream systems .However, planning for river management systems is complicated by a variety of uncertainties but this paper presents the development of a simple assessment model for river management under uncertainty. [Talaei et al. Erosion Hazard Index Methodology (EHIM) for Streams Erodibility Assessment (Ardabil-Province). International Journal of Agricultural Science, Research and Technology, 2012; 2(2):89-97].


1. Anderson, J. R. (1993). State of the Rivers project, Report 1. Development and validation of Methodolojy Queensland Department of Primary Industries Brisbane, 127 pp.
2. Baker, V. R. (1977). Stream – channel response to floods with examples from central Texas. Geol. Soc. Am. Bull. 88: 1057-1071.
3. Barmuta, L. A. Marchant, R. and Lake, P. S. (1992). Degradation of Australian streams and progress towards conservation and management in victoria. In: Boon P. J., Calow, P. and Petts, G. E. (Eds). River Conservation and Management, John Wiley and Sons, Chichester, 65-79.
4. Carlson, R. E. (1977). A tropic state index for lakes. Limnol. Oceanogr. 22 (2): 361–369.
5. Cooper, J. A. G., Ramm, A. E. L.and Harrison, T. D. (1994). The Estuarine Health Index: a new approach to scientific information transfer. Ocean and coastal management. 25: 03-141.
6. Costa, J. E (1974). Response and recovery of a Piedmont watershed from tropical storm Agnes, Jun 1972. Water Resour. Res. 10: 106-112.
7. Department of the Environment Sport and Territories. (1994). State of the Environment Reporting Framework for Australia. Australian
Government Publishing Service, ANB 94/11 Canberra.
8. Division of Water Resources (1992). Towards healthy rivers. Consultancy report, CSIRO, 92/44, Canberra.
9. Dury, G. H. (1973). Magnitude-frequency analysis and channel morphology. In: Fluvial Geomorphology (M. Morisawa Ed.) Pub. Geomorphology. State University of New York, Binghamton, pp. 91-121.
10. Gupta, A. (1975). Stream characteristics in Eastem Jamaica an environment of seasonal flow and large floods. Am. J. Sci. 275: 825-847.
11. Gupta, A. (1983). High magnitude floods and stream channel response. Spec. Publ. Int. Assoc. Sedimentol. 6: 219-227.
12. Holmes, K., Simons, J., Marillier, B., Callow, N., and Galloway, P. (2010). Water erosion hazard assessment of the Lort and Young Rivers catchment. Department of Agriculture and Food, Western Australia. Centre of Excellence for Ecohydrology, University of Western Australia University of Queensland. Resource Management Technical Report 363. 58 pp.
13. Jackson, P. D. and Anderson, j. (1994). A rapid assessment techniue for determining the physical and environmental condition of rivers in Queensland. In: Usy, M. C. (Eds) Classification of Rivers, and Environmental Health Indicators, Proceedings of joint South African/Australian workshop, Cape Town, February 7-14, 1994, Water Research Commission, South Africa.
14. Ladson, A. R. and White, L. J. (2000). Measuring stream condition. In: Brizga, S. and Finlyson, B. (2000). River management :Australasian Experience. John Wiley and Sons LTD. pp. 265-285.
15. Melissa, P. M., Thoms, M. and Norris, R. (2000). Australian River Assessment System: Review of Physical River Assessment Methods, A Biological Perspective. National River Health Program, Cooperative Research Centre for Freshwater Ecology, A report to Environment Australia for the AUSRIVAS Physical and Chemical Assessment Module, 59 pp.
16. Michell, P. (1990). The environmental condition of Victoria streams. Department of water resources, Melbourne Victoria. 102 pp.
17. Nanson, G. C. and Hickin, E. J. (1986). A statistical analysis of bank erosion and channel migration in western Canada. Geological Society of America Bulletin. 97: 497-504.
18. Odgaard, A. J. (1987). Strambank erosion along two rivers in Iowwa. Water Resources Research. 23 (7): 1225-1236.
19. Office of the Commissioner for the Environment (1988). State of the Environmentreport1988: Victoria’s Inland waters. Government of victoria, Melbourne. 655 pp.
20. Pizzuto, J. E. and Meckenburg, T. S. (1989). Evaluation of a linear bank erosion equation. Water Resources Research. 25: 1005-1013.
21. Platts, W. S., Armou, C., Booth, G. D., Bryant, M., Bufford, J. L., Guplin, P., Jensen, S., Lienkanemper, G. W., Minshall, G. W. and Monsen, S. B. (1987). Methods for Evaluating Riparian Habitats with Applications to Managements, United State Department of Agriculture, Washington, DC.
22. Ramm, A. E. L., Cooper, J. A. G., Harrison, T. D. and Singh, R. A. (1994). The estuarine health index:a new approach to scientific information transfer. In: Uys, M. C.( Ed.) Classification of rivers and environmental health indicators, Procceding of a joint south African / Australian workshop, Cape town, February 7-14, Water research commission,south Africa.
23. Rankin, E. T. (1995). Habitat indices in water resource assessments. In: Davis, W.S. and Thomas, S. P. (Eds) Biological assessment and criteria; tools for water resource planning and decision making, Lewis publishers, Boca raton. 415 pp.
24. Talaei, R., Hosseini, A., Azimi, F. and Mesri, M. (2006). Integreated planning for studing and recognition the characteristic of the river and ephemeral river in Ardabil Province. Final Report of research plan, Soil Conservation and Watershed Management Institute, Tehran. 484 pp. (In Persian).
25. Tilleared, J. W. and Department of Water Resources, (1986). A statewide assessment of physical stream conditions in victoria. In: Hydrology and Water resources Symposium, Griffith University, Brisbane, 25-27 November, 1986, The Institution of Engineers, Australia.
26. Xu, F. L., Zhao, Z. Y., Zhan, W., Zhao, S. S., Dawson, R. W., Tao, S. (2005). An ecosystem health index methodology (EHIM) for lake ecosystem health assessment. Ecological Modelling. 188: 327–339.
27. Yoder, C. O. and Rankin, E. T. (1994). Biological criteria program development and implementation in Ohio. In: Davise, W. S. and Thomas, S. P. (Eds) Biological Assessment and Criteria: Tools for water Resource Planning and Decision Making, Lewis Publishers, Boca Raton. 415 pp.
28. Young, W. J, Davis, J. R., Bowmer, K. H. and Fairweather, P. G. (1995). The feasibility of a decision support system for enviromental flows. CSIRO consultancy report, CSIRO divisionof water resources, 95/19, Canberra.