Quantifying the Effect of Ecological Restoration on Soil Erosion in China’s Loess Plateau Region: An Application of the MMF Approach

Land degradation due to erosion is one of the most serious environmental problems in China. To reduce land degradation, the government has taken a number of conservation and restoration measures, including the Sloping Land Conversion Program (SLCP), which was launched in 1999. A logical question is whether these measures have reduced soil erosion at the regional level. The objective of this article is to answer this question by assessing soil erosion dynamics in the Zuli River basin in the Loess Plateau of China from 1999 to 2006. The MMF (Morgan, Morgan and Finney) model was used to simulate changes in runoff and soil erosion over the period of time during which ecological restoration projects were implemented. Some model variables were derived from remotely sensed images to provide improved land surface representation. With an overall accuracy rate of 0.67, our simulations show that increased ground vegetation cover, especially in forestlands and grasslands, has reduced soil erosion by 38.8% on average from 1999 to 2006. During the same time period, however, the change in rainfall pattern has caused a 13.1% ± 4.3% increase in soil erosion, resulting in a net 25.7% ± 8.5% reduction in soil erosion. This suggests that China’s various ecological restoration efforts have been effective in reducing soil loss.

[1]  Jiongxin Xu,et al.  The Water Fluxes of the Yellow River to the Sea in the Past 50 Years, in Response to Climate Change and Human Activities , 2005, Environmental management.

[2]  Bojie Fu,et al.  Evaluating gully erosion using 137Cs and 210Pb/137Cs ratio in a reservoir catchment , 2003 .

[3]  D. Shrestha.  Assessment of soil erosion in the Nepalese Himalaya : a case study in Likhu Khola Valley, Middle Mountain Region , 1997 .

[4]  T. McVicar,et al.  Analysis of the impact of conservation measures on stream flow regime in catchments of the Loess Plateau, China , 2007 .

[5]  Xiaoping Zhang,et al.  Improving a digital elevation model by reducing source data errors and optimising interpolation algorithm parameters: An example in the Loess Plateau, China , 2007, Int. J. Appl. Earth Obs. Geoinformation.

[6]  R. Morgan,et al.  A simple approach to soil loss prediction: a revised Morgan–Morgan–Finney model , 2001 .

[7]  R. P. C. Morgan,et al.  Modified MMF (Morgan–Morgan–Finney) model for evaluating effects of crops and vegetation cover on soil erosion , 2008 .

[8]  Steven M. de Jong,et al.  Derivation of vegetative variables from a landsat tm image for modelling soil erosion , 1994 .

[9]  D. Jupp,et al.  The current and potential operational uses of remote sensing to aid decisions on drought exceptional circumstances in Australia: a review , 1998 .

[10]  T. McVicar,et al.  Developing a decision support tool for China's re-vegetation program: Simulating regional impacts of afforestation on average annual streamflow in the Loess Plateau , 2007 .

[11]  H. Besler.  Slope properties, slope processes and soil erosion risk in the tropical rain forest of Kalimantan Timur (Indonesian Borneo) , 1987 .

[12]  F. Feng,et al.  Reply to "Comment on , 1977 .

[13]  Zhi-ming Feng,et al.  Grain-for-green policy and its impacts on grain supply in West China , 2005 .

[14]  T. McVicar,et al.  Modelling the impact of afforestation on average annual streamflow in the Loess Plateau, China , 2008 .

[15]  Tim R. McVicar,et al.  On the importance of including vegetation dynamics in Budyko's hydrological model , 2006 .

[16]  Peter Strauss,et al.  Evaluation of the MIKE SHE Model for Application in the Loess Plateau, China 1 , 2008 .

[17]  John W. Nicklow,et al.  Multi-objective automatic calibration of SWAT using NSGA-II , 2007 .

[18]  D. Barrett,et al.  Estimating fractional cover of photosynthetic vegetation, non-photosynthetic vegetation and bare soil in the Australian tropical savanna region upscaling the EO-1 Hyperion and MODIS sensors. , 2009 .

[19]  M. Price,et al.  The Ecological Impacts of Outdoor Recreation on Mountain Areas in Europe and North America , 1986 .

[20]  Witold F. Krajewski,et al.  Variability of rainfall rate and raindrop size distributions in heavy rain , 2009 .

[21]  R. Morgan,et al.  Soil erosion in Swaziland: A synthesis , 1997 .

[22]  Keith Beven,et al.  A semi-empirical model to assess uncertainty of spatial patterns of erosion , 2006 .

[23]  A. Dijk,et al.  Rainfall intensity kinetic energy relationships: a critical literature appraisal , 2002 .

[24]  Baoyuan Liu,et al.  Calibration of the LISEM model for a small Loess Plateau catchment , 2003 .

[25]  Luca Montanarella,et al.  Soil erosion risk assessment in Italy , 1999 .

[26]  Tim R. McVicar,et al.  Spatially distributing monthly reference evapotranspiration and pan evaporation considering topographic influences , 2007 .

[27]  B. Datt,et al.  On the relationship between training sample size and data dimensionality: Monte Carlo analysis of broadband multi-temporal classification , 2005 .

[28]  Jianguo Liu,et al.  Revolutionizing China's Environmental Protection , 2008, Science.

[29]  Mingan Shao,et al.  Soil and water loss from the Loess Plateau in China , 2000 .

[30]  S. M. de Jong,et al.  Regional assessment of soil erosion using the distributed model SEMMED and remotely sensed data , 1999 .

[31]  D.D.V. Morgan,et al.  A predictive model for the assessment of soil erosion risk , 1984 .

[32]  R. Morgan.  The impact of recreation on mountain soils: towards a predictive model for soil erosion. In: The ecological impacts of outdoor recreation on mountain areas in Europe and North America (Edited by N.G. Bayfield and G.C. Barrow). , 1985 .

[33]  Zhang Hong-wu,et al.  Development of check-dam systems in gullies on the Loess Plateau, China , 2004 .

[34]  J. Nash,et al.  River flow forecasting through conceptual models part I — A discussion of principles☆ , 1970 .

[35]  Edward Derbyshire,et al.  Geomorphology and climate , 1976 .

[36]  R. Govindaraju,et al.  A physically based model for mobilization of kaolinite particles under hydraulic gradients , 1995 .