So far soil loss due to water is considered there is Universal Soil Loss Equation. It has its modifications and variants to be applied in different situations. A Google search with critical keywords can yield several papers useful to you.

However, I am a bit confused with the use of phrase "hydrological and soil modelling" as if you are interested in soil erosion due to hydrological conditions in loess region prone to gully erosion you may find several equation and models available in literature, but hydrological modelling to me means something else.

Dear Guangju Zhao, Dear Mohammad Firoz Khan,

I am offering you for the Soil erosion modeling: Intensity of Erosion and Outflow – IntErO method (Spalevic, 2011) obtaining data on maximum runoff from the river basin, where Erosion Potential Method - EPM (Gavrilovic, 1972) is embedded in the algorithm of IntErO computer-graphic method.

If you find this approach interesting (see the examples below), I am kindly offering further cooperation on preparing some joint research/papers publishing with this approach in your Countries (free of charge).

For info:

Velibor SPALEVIC, Will MAHONEY, Nevenka DJUROVIC, Neşe ÜZEN and Milic CUROVIC (2012): CALCULATION OF THE SOIL EROSION INTENSITY AND MAXIMUM OUTFLOW FROM THE ROVACKI RIVER BASIN, MONTENEGRO. Agriculture & Forestry, Vol. 58. Issue 3: 7-21, 2012, Podgorica. ISSN 0554-5579 (Printed) ISSN 1800-9492 (Online).

http://www.agricultforest.ac.me/paper.php?journal_id=171&id=2108

Velibor SPALEVIC, Milic CUROVIC, Dragan BOROTA i Budimir FUSTIC (2012): SOIL EROSION IN THE RIVER BASIN ZELJEZNICA, AREA OF BAR, MONTENEGRO. Agriculture & Forestry, Vol. 54. 1-4: 5-24, 2012, Podgorica. ISSN 0554-5579 (Printed) ISSN 1800-9492 (Online).

http://www.agricultforest.ac.me/paper.php?journal_id=157&id=2015

Velibor SPALEVIC, Budimir FUSTIC, Srdjan SOSKIC, Ratko RISTIC (2001): THE ESTIMATE OF MAXIMUM OUTFLOW AND SOIL EROSION INTENSITY IN THE VINICKA RIVER BASIN WITH APPLICATION OF COMPUTER-GRAPHIC METHODS. Agriculture & Forestry, Vol 47. (3-4): 95-104, Podgorica. ISSN 0554-5579 (Printed) ISSN 1800-9492 (Online).

http://www.agricultforest.ac.me/paper.php?journal_id=147&id=495

Budimir FUSTIC, Velibor SPALEVIC: CHARACTERISTICS OF EROSION PROCESSES IN THE RIVER BASIN OF DASPIC RIVER. Agriculture and Forestry, Vol. 46. (1-2): 5-17, Podgorica. ISSN 0554-5579 (Printed) ISSN 1800-9492 (Online).

http://www.agricultforest.ac.me/paper.php?journal_id=144&id=714

Velibor SPALEVIC, Aleksandar DLABAC, Batric SPALEVIC, Budimir FUSTIC, Vaso POPOVIC (2000): APPLICATION OF COMPUTER - GRAPHIC METHODS IN THE RESEARCH OF RUNNOF AND INTENSITY OF GROUND EROSION - I PROGRAM "RIVER BASINS". Agriculture and Forestry, Vol. 46. (1-2): 19-36, Podgorica. ISSN 0554-5579 (Printed) ISSN 1800-9492 (Online).

http://www.agricultforest.ac.me/paper.php?journal_id=144&id=720

Milic CUROVIC, Velibor SPALEVIC, Darko DUBAK and Stevan DOZIC (1999): SUGGESTION FOR ANTI EROSION ARRANGEMENT OF COMPORTMENT 17 FORM UNIT RUDO POLJE – KOVREN. Agriculture and Forestry, Vol. 45. (3-4): 5-23, Podgorica. ISSN 0554-5579 (Printed) ISSN 1800-9492 (Online).

http://www.agricultforest.ac.me/paper.php?journal_id=143&id=49

References:

Spalevic, V. (2011): Impact of land use on runoff and soil erosion in Polimlje. Doctoral thesis. Faculty of Agriculture of the University of Belgrade, Serbia.

Spalevic, V., Curovic, M., Borota, D. and Fustic, B. (2012): Soil erosion in the river basin Zeljeznica, area of Bar, Montenegro. Agriculture & Forestry, Vol. 54. 1-4: 5-24, 2012, Podgorica.

Spalevic, V. (2011): Impact of land use on runoff and soil erosion in Polimlje. Doctoral thesis. Faculty of Agriculture of the University of Belgrade, Serbia.

Spalevic V., Fustic B., Soskic S., Ristic R. (2001): The estimate of maximum outflow and soil erosion intensity in the Vinicka river basin with application of computer graphic methods. Agriculture & Forestry, Vol 47. (3-4): 95-104, Podgorica.

Spalevic V., Dlabac A., Spalevic B., Fustic B., Popovic V. (2000): Application of computer - graphic methods in the research of runoff and intensity of ground erosion - I program "River basins". Agric&For., Vol. 46. (1-2): 19-36, Podgorica.

Spalevic V., Fustic B., Jovovic Z., Curovic M., Spalevic B., Popovic V. (2000): Characteristics of erosion processes and proposal of land reclamation measures in the drainage basin of the Sekularska river. Agriculture and Forestry, Vol. 46 (3-4): 2-18, Podgorica.

Spalevic, V., Dubak, D., Fustic, B., Jovovic, Z., Ristic, R. (1999): The Estimate of the Maximum Outflow and Soil Erosion Intensity in the Kaludra River Basin. Acta Agriculturae Serbica, Vol. IV, 8 (1999) 79-89, Cacak, Serbia.

Spalevic, V. (1999): Application of computer-graphic methods in the studies of draining out and intensities of ground erosion in the Berane valley. Faculty of Agriculture of the University of Belgrade, Serbia.

Dr Velibor SPALEVIC

Biotechnical faculty - Podgorica, University of Montenegro

1, Mihaila Lalica, 81000 Podgorica, Montenegro

Tel.: +382 20 268 431; Fax: +382 20 268 432

Mob: +382 67 201 222; Mob: +382 69 201 222

E-mail: [email protected]

E-mail: [email protected]

Skype: spaleve

Web: www.agricultforest.ac.me

Web: www.agricultforest.ac.me/page.php?id=33

Web: http://scholar.google.com/citations?user=gtwqYnUAAAAJ&hl=en

Dear Guangju Zhao

I am working on the affecability of loess soil from freeze- thaw cycles. My study is in experimental plot scale (0.5*0.5 square meters). Results shows that Loess soil is very susceptible to these cycles and has different responses in runoff and sediment yield production.

Dear Guangju Zhao,

I´also working in that field. Our working group developed and applied the physically based distributed EROSION 3D soil erosion and deposition model in the 1990s predoicting surface runoff and soil erosion by water on agricultural land.

The intention was to create an easy-to-use tool for soil and water conservation planning with the purpose of erosion prediction, the evaluation of soil erosion risks, analyses and design of conservation measures, and assessment of input of particle-bound contaminants in surface water bodies.

EROSION 3D is a distributed physically based computer model for predicting surface runoff and soil erosion by water on agricultural land. It was developed as a BMBF funded project in the 1990s with the intention to create an easy-to-use tool for soil and water conservation planning with the purpose of erosion prediction, the evaluation of soil erosion risks, analyses and design of conservation measures, and assessment of input of particle-bound contaminants in surface water bodies. Erosion 3D calculates event based soil erosion by water, thereby simulating infiltration, runoff, the detachment of soil particles, transport of detached particles by overland flow, incl. grain size distribution of the transported sediment, and the sediment delivery into downstream water courses (Schmidt 1996). It is also able to predict long term soil erosion as a sequence of single events. (Routschek et al., 2013).

Due to its physical approach, Erosion 3D is a universally applicable model. It requires input parameters such as DEM, rainfall data, land use and soil parameters like grain size distribution, bulk density, Corg, hydraulic roughness, water content and soil cover. In- and output parameters are grid–based and can be processed in GIS. Our research group has developed a comprehensive database comprising soil parameters derived from rainfall experiments especially in Loess regions.

please find attached some publications and links

ROUTSCHEK, A., SCHMIDT, A., ENKE, W., DEUTSCHLÄNDER, Th. (2013): Future soil erosion risk — Results of GIS-based model simulations for a catchment in Saxony/Germany. Geomorphology (in press), DOI: j.geomorph.2013.09.033

http://www.sciencedirect.com/science/article/pii/S0169555X13005175

Article Modeling Soil Erosion and resulting Sediment Transport into ...

SCHOB, A., SCHMIDT, J., TENHOLTERN, R. 2006: Derivation of site-related measures to minimise soil erosion on the watershed scale in the Saxonian loess belt using the model EROSION 3D. Catena 68, pp. 153-160

http://www.sciencedirect.com/science/article/pii/S0341816206000762

Article Parameterization of the EROSION 2D/3D soil erosion model usi...