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- Volume 12, Issue 8, 1994
First Break - Volume 12, Issue 8, 1994
Volume 12, Issue 8, 1994
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Georadar for hydrogeology
Authors R.A. van OvermeerenFalling water tables and deteriorating water quality are the major shallow hydrogeological problems currently facing groundwater management in the Netherlands; the former phenomenon is seriously affecting agriculture and nature conservation, where as shallow contaminated groundwater is a hazard for water supply companies and is also an environmental threat. Predictive scenarios are used when planning appropriate management strategies to deal with these problems. These scenarios use models of groundwater flow. Detailed imaging and accurate characterization of the shallow subsurface (down to about 50 m) are essential for the reliability of these models and consequently for the success of groundwater management.
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VSP-based surface-seismic multiple suppression
Authors P.B. Dillon and R.H. EvansDuring conventional processing of surface seismic reflection data, both statistical deconvolution and common midpoint (CMP) stacking with normal (NMO) corrections contribute to the suppression of multiple activity. Statistical deconvolution is limited to short operators of a few hundred milliseconds, and therefore collapses only short-path multiples. The NMO stack attenuates low-velocity multiples by exploiting their greater moveout with respect to the primary reflections. Neither process addresses the removal of long-path, high-velocity multiples. Thus, the two modes of multiple suppression are not fully complementary; a subset of the multiple activity falls beyond the reach of bath, and survives to contaminate the final image.
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Volumes & issues
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Volume 43 (2025)
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Volume 42 (2024)
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Volume 41 (2023)
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Volume 40 (2022)
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Volume 39 (2021)
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Volume 38 (2020)
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Volume 37 (2019)
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Volume 36 (2018)
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Volume 35 (2017)
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Volume 34 (2016)
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Volume 33 (2015)
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Volume 32 (2014)
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Volume 31 (2013)
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Volume 30 (2012)
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Volume 29 (2011)
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Volume 28 (2010)
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Volume 27 (2009)
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Volume 26 (2008)
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Volume 25 (2007)
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Volume 24 (2006)
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Volume 23 (2005)
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Volume 22 (2004)
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Volume 21 (2003)
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Volume 20 (2002)
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Volume 19 (2001)
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Volume 18 (2000)
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Volume 17 (1999)
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Volume 16 (1998)
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Volume 15 (1997)
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Volume 14 (1996)
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Volume 13 (1995)
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Volume 12 (1994)
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Volume 11 (1993)
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Volume 10 (1992)
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Volume 9 (1991)
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Volume 8 (1990)
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Volume 7 (1989)
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Volume 6 (1988)
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Volume 5 (1987)
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Volume 4 (1986)
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Volume 3 (1985)
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Volume 2 (1984)
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Volume 1 (1983)
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