+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Natural erosion rates and sediment delivery ratios in the Hilly Sichuan Basin, southwest China, since the mid-Pleistocene



Natural erosion rates and sediment delivery ratios in the Hilly Sichuan Basin, southwest China, since the mid-Pleistocene



IAHS-AISH Publication 349: 80-85



The present hilly landforms in the Hilly Sichuan Basin above the Three Gorges have developed from the dissection of a large ancient fluvial plain as a result of the incision of the Yangtze River since the Mid-Pleistocene to form the Three Gorges. This paper reports a preliminary assessment of the natural mean annual erosion rate in the Xiaohegou Ravine, a typical small catchment in the Hilly Sichuan Basin, since the Mid-Pleistocene. The mean annual erosion rate is calculated by establishing the volume of material eroded from the zone between the original ancient plain surface and the present land surfaces, using a DEM. This is estimated to be equivalent to a surface lowering rate of 84 mm ka(-1) or 211 t km(-2) a(-1) from the catchment over the last 0.715 Ma. The natural sediment delivery ratio is estimated to be 0.997. The precision of this estimate depends on the accuracy of the elevation data provided by the DEM. The maximum potential error for the estimated natural erosion rates obtained from this study is estimated to be 21.1%.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 037111671

Download citation: RISBibTeXText


Related references

Evaluation the effect of afforestation on soil erosion changes using radionuclides in hilly Sichuan Basin, China. Transactions - Japanese Geomorphological Union 32.3, 2011

Assessing soil erosion rates on manually-tilled hillslopes in the Sichuan Hilly Basin using Cs-137 and Pb-210(ex) measurements. Pedosphere 17(3): 273-283, 2007

137Cs and 21Pbex as soil erosion tracers in the hilly Sichuan Basin and the Three Gorges area of China. 2012

Preliminary study on natural erosion rate in a small watershed of Sichuan hilly basin. Journal of Soil and Water Conservation China 20(1): 1-5, 2006

Assessing soil erosion rates on manually-tilled hillslopes in the Sichuan Hilly Basin using 137Cs and 210Pbex measurements. Pedosphere 17(3): 273-283, 2007

Spatial variability of soil C/N ratio and its influence factors at a county scale in hilly area of Mid-Sichuan Basin, Southwest China. Ying Yong Sheng Tai Xue Bao 26(1): 177-185, 2015

A preliminary assessment of the potential for using Pb-210(ex) measurement to estimate soil redistribution rates on cultivated slopes in the Sichuan Hilly Basin of China. CATENA 68(1): 1-9, 2006

Dating of reservoir and pond deposits by the 137Cs technique to assess sediment production in small catchments of the Hilly Sichuan basin and the Three Gorges Region, China. Sediment dynamics and the hydromorphology of fluvial systems: 348-354, 2006

A preliminary assessment of the potential for using super 210 Pb sub ex measurement to estimate soil redistribution rates on cultivated slopes in the Sichuan hilly basin of China. Catena 68(1): 1-9, 2006

Sediment source identification by using (super 137) Cs and (super 210) Pb radionuclides in a small catchment of the hilly Sichuan Basin, China. Chinese Science Bulletin 49(18): 1953-1957, 2004

Comparative analysis of two distributed soil erosion and sediment yield models in Sichuan Basin, China. IAHS-AISH Publication 337: 329-333, 2010

The organic geochemistry and origin of natural gases in Sichuan Basin, Southwest China. Acta Sedimentologica Sinica 15(2): 49-53, 1997

The forecast of natural oil & gas potential in marine strata, western sichuan basin, southwest china. Dizhi Xuebao 81(8): 1041-1047, 2007

Estimation of the spatial distribution of soil erosion in the hilly area of Sichuan, China. IAHS-AISH Publication 356: 228-234, 2012

The effects of land uses on purplish soil erosion in hilly area of Sichuan Province, China. Journal of Mountain Science 2(1): 68-75, 2005