World's Best Scientists 2026 revealed!
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Environmental Sciences
New Zealand
2025

D-Index & Metrics

Environmental Sciences

D-Index
57
Citations
11024
World Ranking
3476
National Ranking
16

Robert J. Davies-Colley 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 Robert J. Davies-Colley 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: 134 publications — 32nd percentile

32% of scientists in this discipline score the same or lower.

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

Robert J. Davies-Colley 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 Robert J. Davies-Colley 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: 57 D-Index — 65th percentile

65% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2025 - Research.com Environmental Sciences in New Zealand Leader Award
  • 2023 - Research.com Environmental Sciences in New Zealand Leader Award
  • 2022 - Research.com Environmental Sciences in New Zealand Leader Award

Overview

Robert J. Davies-Colley is affiliated with the National Institute of Water and Atmospheric Research in New Zealand. Their research primarily spans the fields of Environmental Science and Earth and Planetary Sciences, with notable contributions in subfields such as Ecology, Oceanography, Water Science and Technology, Nature and Landscape Conservation, and Soil Science.

The scientist has focused on several main research topics, including Fish Ecology and Management Studies, Hydrology and Sediment Transport Processes, Soil Erosion and Sediment Transport, Marine and Coastal Plant Biology, Marine Biology and Ecology Research, Fecal Contamination and Water Quality, and Hydrology and Watershed Management Studies.

Recent published papers demonstrate a broad range of environmental and water-related scientific inquiries:

  • Effects of Fine Sediment on Seagrass Meadows: A Case Study of Zostera muelleri in Pāuatahanui Inlet, New Zealand (2020), Journal of Marine Science and Engineering
  • Fine sediment effects on seagrasses: A global review, quantitative synthesis and multi-stressor model (2021), Marine Environmental Research
  • Weak numerical comparability of ISO-7027-compliant nephelometers. Ramifications for turbidity measurement applications (2021), Hydrological Processes
  • Modeling Contaminant Microbes in Rivers During Both Baseflow and Stormflow (2022), Geophysical Research Letters
  • Comparison of faecal indicator and viral pathogen light and dark disinfection mechanisms in wastewater treatment pond mesocosms (2021), Journal of Environmental Management

The scientist has frequently published in several venues, including:

  • New Zealand Journal of Marine and Freshwater Research
  • Marine Environmental Research
  • Hydrological Processes
  • Geophysical Research Letters
  • The Science of The Total Environment

Collaborative research is a significant aspect of their work, with frequent co-authors such as Andrew O. Hughes, Rebecca Stott, Iñigo Zabarte-Maeztu, Fleur E. Matheson, and Merilyn Manley-Harris.

Best Publications

  • TURBIDITY SUSPENI)ED SEDIMENT, AND WATER CLARITY: A REVIEW 1

    Unknown

  • Sunlight inactivation of fecal indicator bacteria and bacteriophages from waste stabilization pond effluent in fresh and saline waters.

    Lester W. Sinton;Carollyn H. Hall;Philippa A. Lynch;Robert J. Davies-Colley

  • LAND USE EFFECTS ON HABITAT, WATER QUALITY, PERIPHYTON, AND BENTHIC INVERTEBRATES IN WAIKATO, NEW ZEALAND, HILL-COUNTRY STREAMS

    John M. Quinn;A. Bryce Cooper;Robert J. Davies‐Colley;J. Christopher Rutherford

  • Microclimate gradients across a forest edge

    R. J. Davies-Colley;G. W. Payne;M. van Elswijk

  • Inactivation of faecal indicator micro-organisms in waste stabilisation ponds: interactions of environmental factors with sunlight

    R.J Davies-Colley;A.M Donnison;D.J Speed;C.M Ross

  • Sunlight-mediated inactivation of health-relevant microorganisms in water: a review of mechanisms and modeling approaches

    Kara L. Nelson;Alexandria B. Boehm;Robert J. Davies-Colley;Michael C. Dodd

  • Faecal bacteria yields in artificial flood events: quantifying in-stream stores

    R.W. Muirhead;R.J. Davies-Colley;A.M. Donnison;J.W. Nagels

  • Planted Riparian Buffer Zones in New Zealand: Do They Live Up to Expectations?

    Stephanie M. Parkyn;Rob J. Davies-Colley;N. Jane Halliday;Kerry J. Costley

  • Sunlight inactivation of enterococci and fecal coliforms in sewage effluent diluted in seawater.

    Robert J. Davies-Colley;Robert G. Bell;Andrea M. Donnison

  • Absorption of light by yellow substance in freshwater lakes

    R. J. Davies-Colley;W. N. Vant

  • Stream channels are narrower in pasture than in forest

    Robert J. Davies‐Colley

  • Effects of clay discharges on streams

    John M. Quinn;Robert J. Davies-Colley;Christopher W. Hickey;Maggie L. Vickers

  • Estimating solar radiation on slopes of arbitrary aspect

    Y.Q. Tian;R.J. Davies-Colley;P. Gong;B.W. Thorrold

  • Predicting the effects of shade on water temperature in small streams

    J. Christopher Rutherford;Shane Blackett;Colin Blackett;Laurel Saito

  • Effects of clay discharges on streams: 1. Optical properties and epilithon

    Robert J. Davies-Colley;Christopher W. Hickey;John M. Quinn;Paddy A. Ryan

  • Inactivation of enterococci and fecal coliforms from sewage and meatworks effluents in seawater chambers

    L W Sinton;R J Davies-Colley;R G Bell

  • Ecological characterisation, classification, and modelling of New Zealand rivers: An introduction and synthesis

    Barry J. F. Biggs;Maurice J. Duncan;Ian G. Jowett;John M. Quinn

  • Measuring water clarity with a black disk

    Robert J. Davies-Colley

  • Water quality impact of a dairy cow herd crossing a stream

    R. O. B. J. Davies-Colley;John W. Nagels;Rob A. Smith;Roger G. Young

  • Faecal contamination over flood events in a pastoral agricultural stream in New Zealand

    J.W. Nagels;R.J. Davies-Colley;A.M. Donnison;R.W. Muirhead

  • Sunlight Inactivation ofEnterococci andFecal Coliforms in SewageEffluent Diluted inSeawater

    Robert J. Davies-Colley;Robert G. Bell;Andandrea M. Donnison

Frequent Co-Authors

John M. Quinn
John M. Quinn National Institute of Water and Atmospheric Research
Murray E. Close
Murray E. Close Institute of Environmental Science and Research
Barry J. F. Biggs
Barry J. F. Biggs National Institute of Water and Atmospheric Research
Kirsten M. de Beurs
Kirsten M. de Beurs Wageningen University & Research
Aaron I. Packman
Aaron I. Packman Northwestern University
Chris C. Tanner
Chris C. Tanner National Institute of Water and Atmospheric Research
Kara L. Nelson
Kara L. Nelson University of California, Berkeley
Alexandria B. Boehm
Alexandria B. Boehm Stanford University
Rupert J. Craggs
Rupert J. Craggs National Institute of Water and Atmospheric Research

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