Use of 7Be and 137Cs measurements to document short‐ and medium‐term rates of water‐induced soil erosion on agricultural land

Although 137Cs measurements have now been employed for assessing medium-term (∼45 years) rates of soil redistribution on cultivated land in many areas of the world, the potential of 7Be as a sediment tracer in soil erosion investigations has largely been neglected. Because of its much shorter half-life, 7Be measurements should provide a basis for documenting short-term (or event based) rates of soil loss. This paper presents some preliminary results from a detailed investigation of erosion and sediment delivery within a 6.7 ha cultivated field in Devon, England, using both 137Cs and 7Be. Measurements of both radionuclides have been employed to derive estimates of medium- and short-term rates of soil redistribution within the study field. The results obtained from the investigation confirm the potential for using 7Be measurements in soil erosion investigations, both in their own right and in conjunction with 137Cs measurements.

[1]  D. Walling,et al.  EROSION PROCESSES AND LANDFORM EVOLUTION ON AGRICULTURAL LAND - NEW PERSPECTIVES FROM CAESIUM-137 MEASUREMENTS AND TOPOGRAPHIC-BASED EROSION MODELLING , 1997 .

[2]  P. Wallbrink,et al.  Use of fallout radionuclides as indicators of erosion processes , 1993 .

[3]  P. Santschi,et al.  Natural (210Pb, 7Be) and fallout (137Cs, 239,240Pu, 90Sr) radionuclides as geochemical tracers of sedimentation in Greifensee, Switzerland , 1987 .

[4]  D. Walling,et al.  The use of caesium-137 measurements in soil erosion surveys , 1992 .

[5]  D. Correll,et al.  The Rhode River Watershed: Phosphorus Distribution and Export in Forest and Agricultural Soils , 1992 .

[6]  D. Walling,et al.  Validating the ANSWERS soil erosion model using 137Cs. , 1994 .

[7]  D. Walling,et al.  Calibration of caesium-137 measurements to provide quantitative erosion rate data , 1990 .

[8]  I. D. Moore,et al.  Topographic Effects on the Distribution of Surface Soil Water and the Location of Ephemeral Gullies , 1988 .

[9]  Desmond E. Walling,et al.  Improved Models for Estimating Soil Erosion Rates from Cesium‐137 Measurements , 1999 .

[10]  Jerry C. Ritchie,et al.  Application of Radioactive Fallout Cesium-137 for Measuring Soil Erosion and Sediment Accumulation Rates and Patterns: A Review , 1990 .

[11]  M. Baskaran,et al.  7Be distribution in surface soil of central Guizhou karst region and its erosion trace , 1996 .

[12]  Gerard Govers,et al.  The role of tillage in soil redistribution on hillslopes , 1994 .

[13]  E. Clark,et al.  The off-site costs of soil erosion , 1985 .

[14]  D. Walling,et al.  Use of radiometric fingerprints to derive information on suspended sediment sources , 1992 .

[15]  Timothy A. Quine,et al.  THE RELATIVE CONTRIBUTION OF SOIL TILLAGE AND OVERLAND FLOW EROSION TO SOIL REDISTRIBUTION ON AGRICULTURAL LAND , 1996 .

[16]  D. E. Walling,et al.  Use of fallout 137Cs measurements for validating and calibrating soil erosion and sediment delivery models , 1998 .

[17]  D. Walling.  The sediment delivery problem , 1983 .

[18]  D. Walling,et al.  THE DISTRIBUTION OF FALLOUT 137CS AND 210PB IN UNDISTURBED AND CULTIVATED SOILS , 1997 .

[19]  A. Murray,et al.  Distribution and Variability of 7Be in Soils Under Different Surface Cover Conditions and its Potential for Describing Soil Redistribution Processes , 1996 .

[20]  R. Loughran.  The measurement of soil erosion , 1989 .

[21]  J. Robbins,et al.  The partitioning of 7beryllium in fresh water , 1986 .