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John David Hem

Active 1950–1976

Affiliations
United States Geological SurveyMenlo SchoolThis corpus build does not record the country of an author's affiliations, so none is shown here. It does not mean these institutions have no country.
6
Papers
6,526
Citations
6
h-index
6
i10-index

Self-citations are included in these numbers.

Citations per year

Citations

Citations per year for John David Hem1965: 2 citations1966: 3 citations1967: 1 citations1968: 2 citations1969: 2 citations1970: 3 citations1971: 1 citations1972: 5 citations1973: 2 citations1974: 2 citations1975: 3 citations1976: 3 citations1977: 1 citations1978: 5 citations1979: 2 citations1981: 4 citations1982: 2 citations1983: 3 citations1984: 5 citations1985: 4 citations1986: 7 citations1987: 3 citations1988: 7 citations1989: 7 citations1990: 4 citations1991: 5 citations1992: 7 citations1993: 5 citations1994: 5 citations1995: 8 citations1996: 4 citations1997: 2 citations1998: 8 citations1999: 5 citations2000: 10 citations2001: 10 citations2002: 6 citations2003: 18 citations2004: 14 citations2005: 13 citations2006: 15 citations2007: 17 citations2008: 13 citations2009: 10 citations2010: 21 citations2011: 11 citations2012: 15 citations2013: 13 citations2014: 20 citations2015: 19 citations2016: 13 citations2017: 16 citations2018: 19 citations2019: 33 citations2020: 36 citations2021: 19 citations2022: 2 citations2023: 4 citations2024: 3 citations2025: 2 citations1980: no citations, so this year is not shown
  • 1 year (1 citations) is not shown (dated before this author's first paper)

Citation sources

Countries

This corpus build does not record which country the citing authors are in, so the country breakdown is not computed. The other breakdowns below are unaffected.

Institutions

Fields

  • Earth and Planetary Sciences45.9%
  • Environmental Science29.5%
  • Computer Science10.9%
  • Engineering3.8%
  • Chemistry3%
  • Materials Science1.6%
  • Other5.3%

Topics

  • Geochemistry and Geologic Mapping24.7%
  • Groundwater and Isotope Geochemistry23.6%
  • Groundwater and Watershed Analysis6.7%
  • Groundwater flow and contamination studies6.3%
  • Water Quality and Pollution Assessment6%
  • Heavy metals in environment5.4%
  • Other27.3%

Frequent coauthors

All papers

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John David Hem | Litlas