World's Best Scientists 2026 revealed!

D-Index & Metrics

Environmental Sciences

D-Index
41
Citations
11966
World Ranking
7560
National Ranking
2685

Richard B. Alexander publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Richard B. Alexander sits on this spectrum.

41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 283 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 25 scientists 501–510 publications: 17 scientists 511–520 publications: 18 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–686 publications: 3 scientists 687+ publications: 100 scientists
41 publications 687+

This scientist: 108 publications — 17th percentile

17% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 687 publications or more.

Richard B. Alexander D-index placement in Environmental Sciences in 2026

The chart shows the D-index (discipline H-index) distribution of Environmental Sciences scientists ranked by Research.com in 2026. The highlighted bar marks where Richard B. Alexander sits on this spectrum.

30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 199 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 19 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125+ D-Index: 99 scientists
30 D-Index 125+

This scientist: 41 D-Index — 22nd percentile

22% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 125 D-Index or more.

Overview

Richard B. Alexander is affiliated with the United States Geological Survey in the United States. Their research primarily focuses on environmental science, with a strong emphasis on soil and water nutrient dynamics and hydrology and watershed management studies.

Their recent published papers cover a range of topics related to nitrogen and phosphorus fluxes, water quality, and environmental modeling. Key publications include:

  • Low threshold for nitrogen concentration saturation in headwaters increases regional and coastal delivery, 2020, Environmental Research Letters
  • Application of the RSPARROW Modeling Tool to Estimate Total Nitrogen Sources to Streams and Evaluate Source Reduction Management Scenarios in the Grande River Basin, Brazil, 2020, Water
  • Power analysis for detecting the effects of best management practices on reducing nitrogen and phosphorus fluxes to the Chesapeake Bay Watershed, USA, 2022, Ecological Indicators
  • Idiopathic Regression in Down Syndrome, 2025, BJPsych Open

The scientist collaborates with several frequent co-authors, including:

  • N. M. Schmadel
  • Judson W. Harvey
  • Elizabeth W. Boyer
  • Gregory E. Schwarz
  • J. D. Gomez-Velez

Their work has been published in a variety of academic venues, most notably:

  • Environmental Research Letters
  • Water
  • Ecological Indicators
  • BJPsych Open

Richard B. Alexander's research spans multiple subfields within environmental science, including:

  • Environmental Chemistry
  • Water Science and Technology
  • Geochemistry and Petrology
  • Soil Science
  • Nature and Landscape Conservation

Main topics addressed in their work involve:

  • Soil and Water Nutrient Dynamics
  • Hydrology and Watershed Management Studies
  • Groundwater and Isotope Geochemistry
  • Soil erosion and sediment transport
  • Fish Ecology and Management Studies
  • Crime, Illicit Activities, and Governance
  • Cybercrime and Law Enforcement Studies

Best Publications

  • Effect of stream channel size on the delivery of nitrogen to the Gulf of Mexico

    Richard B. Alexander;Richard A. Smith;Gregory E. Schwarz

  • Differences in phosphorus and nitrogen delivery to the Gulf of Mexico from the Mississippi River Basin.

    Richard B. Alexander;Richard A. Smith;Gregory E. Schwarz;Elizabeth W. Boyer

  • Regional interpretation of water‐quality monitoring data

    Richard A. Smith;Gregory E. Schwarz;Richard B. Alexander

  • The Role of Headwater Streams in Downstream Water Quality

    Richard B. Alexander;Elizabeth W. Boyer;Richard A. Smith;Gregory E. Schwarz

  • SELECTION OF METHODS FOR THE DETECTION AND ESTIMATION OF TRENDS IN WATER QUALITY

    Robert M. Hirsch;Richard B. Alexander;Richard A. Smith

  • Nitrogen retention in rivers: model development and application to watersheds in the northeastern U.S.A.

    Sybil P. Seitzinger;Renée V. Styles;Elizabeth W. Boyer;Richard B. Alexander

  • Water-Quality Trends in the Nation's Rivers

    Richard A. Smith;Richard B. Alexander;M. Gordon Wolman

  • The regional and global significance of nitrogen removal in lakes and reservoirs

    John A. Harrison;Roxane J. Maranger;Richard B. Alexander;Anne E. Giblin

  • Natural background concentrations of nutrients in streams and rivers of the conterminous United States.

    Richard A. Smith;Richard B. Alexander;Gregory E. Schwarz

  • Modeling denitrification in terrestrial and aquatic ecosystems at regional scales.

    Elizabeth W. Boyer;Richard B. Alexander;William J. Parton;Changsheng Li

  • Dynamic modeling of nitrogen losses in river networks unravels the coupled effects of hydrological and biogeochemical processes

    Richard B. Alexander;John Karl Böhlke;Elizabeth W. Boyer;Mark B. David

  • Estimating the sources and transport of nutrients in the Waikato River Basin, New Zealand

    Richard B. Alexander;Alexander H. Elliott;Ude Shankar;Graham B. McBride

  • A comparison of models for estimating the riverine export of nitrogen from large watersheds

    Richard B. Alexander;Penny J. Johnes;Elizabeth W. Boyer;Richard A. Smith

  • Carbon budget of tidal wetlands, estuaries, and shelf waters of Eastern North America

    R. G. Najjar;M. Herrmann;R. Alexander;E. W. Boyer

  • Section 3. The SPARROW Surface Water-Quality Model: Theory, Application and User Documentation

    Gregory Schwarz;Anne B. Hoos;R.B. Alexander;R.A. Smith

  • Data from selected U.S. Geological Survey National Stream Water Quality Monitoring Networks

    Richard B. Alexander;James R. Slack;Amy S. Ludtke;Kathleen K. Fitzgerald

  • Characterization of Nutrient, Organic Carbon, and Sediment Loads and Concentrations from the Mississippi River into the Northern Gulf of Mexico

    R.E. Turner;N.N. Rabalais;Richard B. Alexander;G. McIsaac

  • Net ecosystem production and organic carbon balance of U.S. East Coast estuaries: A synthesis approach

    Maria Herrmann;Raymond G. Najjar;W. Michael Kemp;Richard B. Alexander

  • County-level estimates of nitrogen and phosphorus fertilizer use in the United States, 1945 to 1985

    Richard B. Alexander;Richard A. Smith

  • State Soil Geographic (STATSGO) Data Base for the Conterminous United States

    Gregory E. Schwarz;R.B. Alexander

Frequent Co-Authors

Elizabeth W. Boyer
Elizabeth W. Boyer Pennsylvania State University
Judson W. Harvey
Judson W. Harvey United States Geological Survey
Durelle T. Scott
Durelle T. Scott Virginia Tech
Heather E. Golden
Heather E. Golden Environmental Protection Agency
Sybil P. Seitzinger
Sybil P. Seitzinger University of Victoria
Dale M. Robertson
Dale M. Robertson United States Geological Survey
Kevin Bishop
Kevin Bishop Swedish University of Agricultural Sciences
Wei-Jun Cai
Wei-Jun Cai University of Delaware
Raymond G. Najjar
Raymond G. Najjar Pennsylvania State University
Wilfred M. Wollheim
Wilfred M. Wollheim University of New Hampshire

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Exploring environmental sciences often leads students to consider diverse academic paths that complement their core interests. For those seeking a straightforward academic entry point, the easiest bachelor degree programs can provide foundational knowledge with more manageable coursework, enabling a smoother transition into environmental studies.

For students passionate about Earth systems, specialized fields like geology are vital. Pursuing online geology degrees offers detailed understanding of geological processes, which is crucial for environmental assessment and conservation.

Technological advances have also made Geographic Information Systems (GIS) indispensable in environmental research and management. Enrolling in dedicated gis degree programs equips students with skills to analyze spatial data, vital for mapping ecosystems and planning sustainable projects.

For those aiming to influence environmental policy and administration, a Master of Public Administration is often ideal. Accelerated options like 1 year mpa programs allow professionals to quickly advance their leadership capabilities, driving meaningful change in environmental governance.

Best Scientists Citing Richard B. Alexander

Trending Scientists

Recently Published Articles