| # | Discipline | Articles | Citations | R ARank | R CRank |
|---|
| 1 | Pollution | 332 | 11,900 | 244 | 406 |
| 2 | environmental pollution | 232 | 6,845 | 184 | 259 |
| 3 | Environmental Health | 154 | 6,081 | 543 | 592 |
| 4 | Environmental Engineering | 147 | 5,972 | 282 | 350 |
| 5 | sanitation | 83 | 4,627 | 230 | 305 |
| 6 | Toxicology | 106 | 4,552 | 680 | 530 |
| 7 | pollutants | 80 | 3,236 | 113 | 100 |
| 7 | Environmental pollutants | 80 | 3,236 | 170 | 123 |
| 9 | Science | 51 | 3,201 | 3.9K | 3.7K |
| 10 | Environmental Chemistry | 84 | 3,141 | 172 | 337 |
| 11 | Ecology | 115 | 3,066 | 1.0K | 1.5K |
| 12 | environmental protection | 98 | 2,861 | 247 | 396 |
| 13 | Hydrology | 74 | 2,538 | 344 | 310 |
| 14 | Environmental Toxicology | 79 | 2,149 | 190 | 389 |
| 15 | Environmental Management | 62 | 2,042 | 248 | 392 |
| 16 | Marine Biology | 24 | 1,923 | 1.0K | 470 |
| 17 | Environmental monitoring | 67 | 1,840 | 498 | 709 |
| 18 | Environment | 58 | 1,785 | 1.1K | 1.8K |
| 19 | Water | 37 | 1,784 | 460 | 480 |
| 20 | Environmental risk assessment | 50 | 1,540 | 6 | 12 |
| 21 | environmental control | 49 | 1,533 | 6 | 11 |
| 22 | Geophysics | 46 | 1,527 | 1.1K | 1.1K |
| 23 | Research | 46 | 1,523 | 3.5K | 3.2K |
| 24 | Medicine | 40 | 1,495 | 4.6K | 4.4K |
| 25 | Oceanography | 29 | 1,490 | 552 | 380 |
| 26 | Biotechnology | 33 | 1,408 | 2.5K | 2.3K |
| 27 | Nanotechnology | 45 | 1,319 | 1.7K | 1.9K |
| 28 | Planets | 21 | 1,244 | 835 | 691 |
| 29 | Water pollution | 25 | 1,233 | 839 | 660 |
| 30 | Hydraulic Engineering | 71 | 1,175 | 52 | 63 |
| 31 | Technology | 35 | 1,098 | 1.2K | 908 |
| 32 | Physics | 30 | 1,048 | 4.6K | 5.5K |
| 33 | Transportation | 63 | 965 | 184 | 299 |
| 33 | Roads | 63 | 965 | 100 | 104 |
| 35 | water supply | 29 | 946 | 273 | 333 |
| 36 | Materials | 56 | 907 | 1.7K | 2.4K |
| 37 | Risk Management | 20 | 902 | 149 | 105 |
| 38 | Risk | 20 | 894 | 142 | 127 |
| 39 | Probability | 19 | 893 | 267 | 147 |
| 39 | Financial management | 19 | 893 | 111 | 111 |
| 41 | Biology | 40 | 819 | 4.3K | 6.2K |
| 42 | Botany | 22 | 817 | 1.8K | 1.7K |
| 43 | Microbiology | 23 | 791 | 3.6K | 3.7K |
| 44 | Chemistry | 28 | 761 | 5.0K | 5.2K |
| 45 | Analytical Chemistry | 28 | 757 | 1.9K | 1.9K |
| 46 | Biomedical Engineering | 15 | 748 | 2.8K | 1.9K |
| 47 | Meteorology | 7 | 727 | 1.8K | 1.1K |
| 48 | Structural Engineering | 40 | 711 | 216 | 211 |
| 49 | United States | 47 | 600 | 1.5K | 2.1K |
| 50 | Ocean Engineering | 44 | 596 | 100 | 195 |
| 51 | Harbors | 43 | 573 | 2 | 3 |
| 52 | ports | 42 | 572 | 6 | 20 |
| 52 | Waterways | 42 | 572 | 2 | 3 |
| 54 | Nonlinear Dynamics | 9 | 542 | 1.6K | 982 |
| 54 | Statistical physics | 9 | 542 | 2.6K | 1.5K |
| 56 | Water quality management | 38 | 532 | 330 | 537 |
| 57 | Geotechnical Engineering | 22 | 523 | 94 | 114 |
| 58 | Plant Biotechnology | 1 | 506 | 1.6K | 289 |
| 58 | Plant genetic engineering | 1 | 506 | 1.8K | 471 |
| 60 | Microbial Ecology | 15 | 504 | 1.2K | 1.6K |
| 61 | Environmental Geology | 18 | 503 | 359 | 341 |
| 62 | Computational Biology | 16 | 448 | 1.5K | 1.6K |
| 63 | Bioinformatics | 16 | 442 | 1.2K | 1.3K |
| 64 | North America | 30 | 432 | 79 | 123 |
| 65 | Biocompatible Materials | 16 | 422 | 2.1K | 2.6K |
| 66 | Geography | 16 | 409 | 1.1K | 970 |
| 67 | Molecular Biology | 20 | 402 | 4.7K | 6.0K |
| 68 | Fisheries | 22 | 400 | 465 | 614 |
| 69 | Glaciology | 7 | 390 | 238 | 137 |
| 69 | glaciers | 7 | 390 | 229 | 135 |
| 71 | Genomics | 18 | 384 | 1.6K | 2.1K |
| 72 | Environmental Policy | 14 | 383 | 1.4K | 1.9K |
| 73 | Agricultural Ecology | 15 | 379 | 496 | 791 |
| 74 | Earth Sciences | 6 | 374 | 2.6K | 1.5K |
| 75 | Marine Meteorology | 3 | 372 | 326 | 152 |
| 76 | Soil Science | 17 | 362 | 607 | 740 |
| 77 | Wetland ecology | 29 | 354 | 50 | 144 |
| 78 | Biochemistry | 15 | 339 | 5.6K | 5.9K |
| 79 | Materials Science | 24 | 335 | 2.3K | 3.0K |
| 80 | Ichthyology | 17 | 333 | 112 | 76 |
| 80 | Fish | 17 | 333 | 78 | 57 |
| 82 | miniaturization | 10 | 320 | 1.3K | 1.5K |
| 83 | toxicity testing | 3 | 319 | 860 | 277 |
| 84 | impact | 5 | 316 | 75 | 36 |
| 85 | Nanostructured Materials | 18 | 305 | 1.7K | 2.2K |
| 86 | Reservoirs | 26 | 304 | 13 | 20 |
| 87 | Biodiversity conservation | 8 | 301 | 1.3K | 1.6K |
| 87 | Chromosome mapping | 15 | 301 | 886 | 1.4K |
| 87 | gene mapping | 15 | 301 | 1.0K | 1.7K |
| 90 | Spectrum analysis | 11 | 286 | 2.6K | 2.4K |
| 91 | Nanoparticles | 9 | 285 | 1.3K | 1.2K |
| 92 | Colloids | 9 | 279 | 2.3K | 2.4K |
| 93 | rivers | 18 | 275 | 50 | 121 |
| 94 | Green Chemistry | 2 | 273 | 2.4K | 1.4K |
| 95 | natural disasters | 15 | 268 | 420 | 688 |
| 96 | Building Materials | 32 | 267 | 142 | 634 |
| 97 | Industrial Microbiology | 11 | 261 | 1.1K | 1.6K |
| 98 | hazard mitigation | 12 | 249 | 322 | 454 |
| 99 | Bioengineering | 11 | 243 | 2.8K | 3.8K |
| 99 | Nanostructures | 9 | 243 | 1.3K | 1.5K |
| 101 | Surface Chemistry | 7 | 240 | 2.6K | 2.4K |
| 102 | Engineering | 18 | 237 | 1.9K | 2.1K |
| 103 | soil pollution | 20 | 234 | 73 | 209 |
| 104 | Population Genetics | 11 | 231 | 751 | 1.1K |
| 105 | concrete | 7 | 221 | 419 | 347 |
| 106 | Geomorphology | 8 | 220 | 556 | 619 |
| 107 | Genetics | 7 | 219 | 3.5K | 4.1K |
| 108 | Civil Engineering | 19 | 218 | 553 | 440 |
| 109 | Highway Engineering | 15 | 213 | 128 | 141 |
| 109 | Sedimentology | 18 | 213 | 196 | 490 |
| 111 | Data Mining | 8 | 211 | 1.0K | 1.1K |
| 111 | particles | 7 | 211 | 421 | 312 |
| 113 | Granular materials | 6 | 210 | 173 | 136 |
| 114 | Groundwater | 9 | 208 | 434 | 377 |
| 115 | Restoration Ecology | 8 | 205 | 235 | 270 |
| 116 | Microbial Metabolism | 6 | 200 | 82 | 135 |
| 117 | Catalysis | 11 | 199 | 2.2K | 2.7K |
| 117 | Wetland conservation | 23 | 199 | 51 | 185 |
| 117 | Wetlands | 23 | 199 | 51 | 186 |
| 120 | Estuaries | 3 | 193 | 192 | 180 |
| 121 | Molecular ecology | 7 | 192 | 896 | 1.3K |
| 122 | Environmental Law | 6 | 186 | 744 | 1.2K |
| 123 | Medical innovations | 3 | 185 | 1.3K | 1.6K |
| 124 | Medical Laboratory Science | 7 | 183 | 1.8K | 2.0K |
| 125 | Molecular Genetics | 6 | 182 | 1.6K | 1.9K |
| 125 | Natural history | 24 | 182 | 1.8K | 6.3K |
| 127 | Composite Materials | 7 | 180 | 1.4K | 1.4K |
| 128 | ecosystem | 10 | 179 | 778 | 1.3K |
| 129 | public works | 10 | 171 | 17 | 37 |
| 130 | Medical Technology | 3 | 169 | 2.3K | 1.3K |
| 131 | Engineering Geology | 31 | 168 | 269 | 881 |
| 131 | Hydrometeorology | 6 | 168 | 139 | 244 |
| 133 | Zoology | 9 | 166 | 1.9K | 1.7K |
| 134 | Robotics | 4 | 159 | 1.6K | 1.1K |
| 135 | Environmental forensics | 5 | 157 | 28 | 15 |
| 135 | mammals | 3 | 157 | 1.3K | 773 |
| 137 | Polymers | 18 | 156 | 2.6K | 3.6K |
| 137 | Geographic information systems | 11 | 156 | 473 | 530 |
| 137 | Plants | 9 | 156 | 1.5K | 2.1K |
| 140 | wetland management | 6 | 155 | 75 | 108 |
| 141 | environmental exposure | 8 | 153 | 1.3K | 1.7K |
| 142 | Chemical Engineering | 7 | 150 | 3.2K | 3.4K |
| 142 | Industrial Safety | 2 | 150 | 1.4K | 470 |
| 144 | Computational Chemistry | 7 | 149 | 498 | 666 |
| 145 | Systems Biology | 9 | 141 | 1.1K | 1.4K |
| 145 | Computer-Aided Design | 7 | 141 | 667 | 714 |
| 147 | Plant Ecology | 10 | 139 | 971 | 1.7K |
| 147 | environmental remediation | 10 | 139 | 79 | 222 |
| 147 | Cheminformatics | 4 | 139 | 339 | 433 |
| 150 | vibration | 8 | 138 | 704 | 644 |
| 151 | Geochemistry | 12 | 137 | 827 | 1.2K |
| 151 | soil microbiology | 5 | 137 | 1.1K | 1.7K |
| 151 | Plant diseases | 6 | 137 | 1.7K | 1.6K |
| 154 | Mathematics | 13 | 132 | 3.8K | 3.4K |
| 155 | Phytochemistry | 8 | 129 | 78 | 200 |
| 155 | Phytoremediation | 8 | 129 | 78 | 200 |
| 155 | Bioreactors | 8 | 129 | 78 | 200 |
| 158 | Wildlife management | 4 | 128 | 500 | 346 |
| 159 | cell physiology | 7 | 126 | 1.4K | 2.1K |
| 160 | Chemical structure | 14 | 122 | 120 | 205 |
| 161 | Public Health | 4 | 121 | 6.9K | 6.1K |
| 162 | Traffic Engineering | 11 | 119 | 154 | 393 |
| 162 | plant communities | 8 | 119 | 780 | 1.4K |
| 164 | data collection | 5 | 112 | 924 | 1.1K |
| 165 | Ornithology | 5 | 111 | 947 | 787 |
| 166 | Carcinogenesis | 2 | 105 | 1.6K | 1.4K |
| 166 | Environmental carcinogens | 2 | 105 | 43 | 56 |
| 168 | Surface-Active Agents | 2 | 103 | 1.4K | 1.2K |
| 168 | Surface properties | 2 | 103 | 1.4K | 1.2K |
| 168 | polymerization | 12 | 103 | 2.5K | 3.5K |
| 171 | biological evolution | 3 | 102 | 2.6K | 2.7K |
| 172 | Physical Chemistry | 1 | 101 | 4.2K | 2.5K |
| 173 | Freshwater invertebrates | 1 | 100 | 217 | 167 |
| 174 | atmospheric models | 4 | 99 | 682 | 799 |
| 174 | Cement | 1 | 99 | 615 | 295 |
| 176 | Conservation Biology | 8 | 98 | 679 | 1.3K |
| 177 | cryosphere | 3 | 96 | 420 | 430 |
| 178 | Soil Mechanics | 20 | 95 | 282 | 795 |
| 178 | Molecular structure | 13 | 95 | 1.0K | 2.3K |
| 180 | Geology | 7 | 94 | 2.3K | 2.5K |
| 180 | biological invasions | 11 | 94 | 256 | 730 |
| 182 | Engineering Mathematics | 10 | 93 | 1.6K | 1.8K |
| 182 | Agricultural Chemistry | 3 | 93 | 3.0K | 2.8K |
| 182 | Remote Sensing | 6 | 93 | 693 | 791 |
| 185 | Plant physiology | 2 | 92 | 2.7K | 2.6K |
| 186 | Forest Ecology | 6 | 90 | 418 | 640 |
| 186 | Cosmochemistry | 10 | 90 | 161 | 379 |
| 188 | Marine Pollution | 5 | 87 | 810 | 1.3K |
| 188 | genome | 3 | 87 | 2.2K | 2.7K |
| 190 | Ceramics | 11 | 86 | 967 | 1.5K |
| 191 | nanoscience | 3 | 85 | 3.5K | 3.6K |
| 192 | Glass | 5 | 84 | 1.1K | 1.4K |
| 192 | pottery | 5 | 84 | 1.1K | 1.4K |
| 194 | invasive plants | 8 | 81 | 33 | 55 |
| 194 | Birds | 8 | 81 | 935 | 1.1K |
| 196 | Regional Planning | 1 | 78 | 2.8K | 1.5K |
| 196 | Regional Economics | 1 | 78 | 892 | 438 |
| 196 | Microelectronics | 5 | 78 | 1.7K | 2.2K |
| 196 | Regionalism | 1 | 78 | 469 | 185 |
| 200 | Mechanical Engineering | 12 | 77 | 1.4K | 1.8K |
| 200 | Structure-activity relationship | 3 | 77 | 489 | 469 |
| 202 | Waste management | 3 | 76 | 1.8K | 1.5K |
| 202 | Water Purification | 3 | 76 | 1.5K | 1.3K |
| 202 | water resources | 4 | 76 | 193 | 164 |
| 202 | Lightweight concrete | 2 | 76 | 177 | 291 |
| 206 | Calorimetry | 1 | 71 | 2.2K | 1.1K |
| 206 | Thermal analysis | 1 | 71 | 2.2K | 1.1K |
| 208 | Landslides | 2 | 70 | 367 | 392 |
| 208 | DNA | 5 | 70 | 501 | 737 |
| 210 | Climate change | 1 | 68 | 2.1K | 2.2K |
| 210 | Eutrophication | 1 | 68 | 1.9K | 2.1K |
| 212 | Endocrinology | 4 | 66 | 3.6K | 4.5K |
| 213 | Industrial Engineering | 9 | 65 | 1.3K | 2.3K |
| 214 | Coastal Engineering | 7 | 64 | 52 | 95 |
| 215 | Fluid Mechanics | 5 | 63 | 1.8K | 2.0K |
| 216 | Biogeochemistry | 3 | 62 | 1.2K | 1.6K |
| 216 | Scandinavia | 1 | 62 | 1.4K | 786 |
| 216 | Entomology | 12 | 62 | 1.5K | 2.4K |
| 219 | Biochemical Engineering | 2 | 61 | 3.6K | 4.3K |
| 219 | Ecosystem management | 6 | 61 | 485 | 951 |
| 219 | Biodiversity | 9 | 61 | 1.7K | 3.1K |
| 222 | Fire ecology | 2 | 60 | 101 | 81 |
| 222 | Vaccines | 2 | 60 | 2.5K | 2.3K |
| 224 | Transportation Engineering | 10 | 59 | 130 | 423 |
| 224 | Renewable Energy Sources | 3 | 59 | 2.1K | 3.1K |
| 224 | Great Lakes | 5 | 59 | 68 | 137 |
| 227 | Nondestructive testing | 3 | 58 | 664 | 555 |
| 227 | Public Policy | 1 | 58 | 3.2K | 2.2K |
| 227 | Structural health monitoring | 3 | 58 | 210 | 281 |
| 227 | Health Education | 1 | 58 | 3.9K | 2.4K |
| 227 | structural stability | 3 | 58 | 416 | 440 |
| 227 | medical education | 1 | 58 | 4.0K | 2.4K |
| 227 | health planning | 1 | 58 | 3.3K | 2.0K |
| 234 | Industrial Ecology | 1 | 57 | 416 | 367 |
| 234 | forestry | 2 | 57 | 356 | 329 |
| 236 | Mass Spectrometry | 1 | 56 | 2.5K | 1.8K |
| 236 | Insects | 9 | 56 | 956 | 1.6K |
| 238 | Physiology | 1 | 55 | 7.1K | 5.9K |
| 238 | Functional Genomics | 1 | 55 | 724 | 727 |
| 240 | Soil ecology | 2 | 54 | 715 | 878 |
| 241 | Risk assessment | 5 | 53 | 466 | 707 |
| 241 | ecological risk assessment | 5 | 53 | 165 | 416 |
| 241 | Health Risk Assessment | 5 | 53 | 332 | 598 |
| 244 | computer networks | 2 | 51 | 3.0K | 2.4K |
| 245 | Ecological Genetics | 5 | 49 | 555 | 853 |
| 245 | Electrochemistry | 5 | 49 | 3.1K | 3.7K |
| 245 | Chemical analysis | 2 | 49 | 1.9K | 1.9K |
| 245 | Evolution | 1 | 49 | 3.8K | 3.2K |
| 249 | Aquatic ecology | 8 | 48 | 673 | 1.4K |
| 250 | Cybernetics | 3 | 46 | 1.8K | 2.2K |
| 250 | Molecules | 1 | 46 | 2.6K | 1.7K |
| 252 | Freshwater Ecology | 6 | 45 | 154 | 273 |
| 253 | biological monitoring | 8 | 44 | 261 | 1.0K |
| 254 | Climatology | 2 | 43 | 2.4K | 2.7K |
| 254 | Informatics | 1 | 43 | 1.8K | 1.4K |
| 256 | explosives | 6 | 42 | 177 | 239 |
| 256 | Southern states | 12 | 42 | 83 | 281 |
| 258 | Fracture mechanics | 2 | 40 | 1.3K | 1.3K |
| 258 | Chromatography | 4 | 40 | 1.7K | 2.4K |
| 258 | Chromatographic analysis | 4 | 40 | 2.0K | 2.7K |
| 261 | Systems Engineering | 9 | 39 | 1.4K | 2.7K |
| 261 | Marine Ecology | 3 | 39 | 769 | 976 |
| 261 | Soft Condensed Matter | 2 | 39 | 1.6K | 1.8K |
| 261 | biopolymers | 2 | 39 | 1.8K | 2.0K |
| 261 | freshwater biology | 4 | 39 | 896 | 1.5K |
| 266 | Intelligent Transportation Systems | 1 | 38 | 1.8K | 1.5K |
| 266 | Cartography | 2 | 38 | 696 | 507 |
| 268 | Biophysics | 5 | 37 | 5.8K | 7.9K |
| 268 | management | 4 | 37 | 2.9K | 3.8K |
| 270 | Computational Fluid Dynamics | 1 | 36 | 959 | 605 |
| 271 | environmental indicators | 1 | 35 | 1.1K | 1.3K |
| 271 | Metallography | 1 | 35 | 792 | 610 |
| 273 | Rock Mechanics | 2 | 34 | 937 | 1.0K |
| 273 | Biosensors | 1 | 34 | 2.1K | 2.6K |
| 273 | Corporate governance | 1 | 34 | 920 | 759 |
| 273 | Aquatic ecosystems | 5 | 34 | 110 | 252 |
| 273 | Bioelectronics | 1 | 34 | 1.8K | 2.3K |
| 278 | Coastal zone management | 3 | 33 | 490 | 800 |
| 278 | emergency management | 5 | 33 | 707 | 1.4K |
| 280 | Atmospheric Physics | 5 | 32 | 1.4K | 2.5K |
| 280 | Arthropods | 2 | 32 | 381 | 384 |
| 280 | Psychophysiology | 1 | 32 | 4.6K | 4.5K |
| 283 | Automation | 1 | 31 | 3.4K | 2.9K |
| 283 | Soil biology | 1 | 31 | 977 | 1.2K |
| 283 | Soil fertility | 1 | 31 | 719 | 873 |
| 286 | Software Engineering | 3 | 30 | 1.3K | 1.4K |
| 286 | wind erosion | 2 | 30 | 51 | 123 |
| 286 | protein | 2 | 30 | 1.9K | 2.3K |
| 286 | proteins | 2 | 30 | 3.3K | 3.9K |
| 290 | polar regions | 1 | 28 | 1.3K | 1.2K |
| 290 | Industry | 1 | 28 | 520 | 786 |
| 292 | Manufacturing Processes | 2 | 27 | 2.8K | 3.0K |
| 293 | Genetic Toxicology | 1 | 26 | 824 | 1.1K |
| 293 | Quality Management | 1 | 26 | 446 | 305 |
| 293 | Human-Computer Interaction | 1 | 26 | 2.9K | 2.5K |
| 293 | Total Quality Management | 1 | 26 | 938 | 786 |
| 293 | Chromosomes | 1 | 26 | 1.6K | 1.8K |
| 298 | Numerical Analysis | 2 | 25 | 3.0K | 2.9K |
| 298 | Online social networks | 1 | 25 | 709 | 522 |
| 300 | Stochastic Processes | 3 | 24 | 1.0K | 1.4K |
| 300 | Diagnostic Imaging | 3 | 24 | 2.7K | 3.6K |
| 300 | Knowledge management | 1 | 24 | 1.0K | 464 |
| 300 | Social Change | 1 | 24 | 1.3K | 1.5K |
| 300 | Sound | 14 | 24 | 444 | 1.6K |
| 300 | biomimicry | 2 | 24 | 219 | 364 |
| 300 | herbicides | 3 | 24 | 433 | 750 |
| 307 | Epidemiology | 2 | 23 | 6.1K | 7.4K |
| 307 | Hydrogeology | 2 | 23 | 1.0K | 1.3K |
| 307 | Hazardous waste | 3 | 23 | 905 | 2.1K |
| 310 | Condensed Matter | 3 | 22 | 3.8K | 4.6K |
| 310 | energy development | 1 | 22 | 1.7K | 1.8K |
| 310 | Membranes | 1 | 22 | 2.3K | 2.7K |
| 310 | Navigation | 2 | 22 | 751 | 730 |
| 314 | Physical Geography | 1 | 21 | 1.2K | 1.0K |
| 314 | soil conservation | 3 | 21 | 953 | 1.7K |
| 314 | Mycology | 2 | 21 | 2.2K | 2.8K |
| 314 | radar | 2 | 21 | 346 | 459 |
| 314 | ground penetrating radar | 2 | 21 | 70 | 90 |
| 319 | Mining Engineering | 1 | 20 | 702 | 513 |
| 319 | Latin America | 1 | 20 | 2.7K | 1.5K |
| 319 | Microscopy | 1 | 20 | 3.8K | 2.9K |
| 319 | Fluorescence | 3 | 20 | 437 | 866 |
| 323 | Combustion | 3 | 19 | 946 | 1.5K |
| 323 | Combinatorial chemistry | 1 | 19 | 2.0K | 2.2K |
| 323 | Underwater acoustics | 2 | 19 | 76 | 134 |
| 323 | Powder Metallurgy | 1 | 19 | 1.0K | 537 |
| 323 | Environmental Geochemistry | 1 | 19 | 1.3K | 1.3K |
| 323 | Optical materials | 2 | 19 | 3.0K | 4.2K |
| 323 | Chemical industry | 1 | 19 | 2.6K | 2.3K |
| 323 | Minerals | 1 | 19 | 1.6K | 1.7K |
| 331 | Aerospace Engineering | 1 | 18 | 760 | 496 |
| 331 | Telecommunication Systems | 1 | 18 | 2.7K | 2.3K |
| 331 | Pharmacogenetics | 1 | 18 | 2.3K | 2.7K |
| 331 | Animal Behavior | 2 | 18 | 2.4K | 3.6K |
| 331 | Genetic Research | 1 | 18 | 444 | 487 |
| 331 | Geochemical Modeling | 1 | 18 | 553 | 592 |
| 331 | Ethology | 2 | 18 | 1.8K | 2.9K |
| 331 | Soil stabilization | 3 | 18 | 46 | 135 |
| 331 | Electromagnetic waves | 4 | 18 | 255 | 518 |
| 331 | Watershed management | 2 | 18 | 331 | 451 |
| 331 | actuators | 1 | 18 | 2.4K | 2.8K |
| 331 | geological modeling | 2 | 18 | 726 | 999 |
| 331 | Seaweed | 1 | 18 | 1.2K | 1.4K |
| 331 | California | 2 | 18 | 662 | 930 |
| 331 | transducers | 1 | 18 | 2.4K | 2.8K |
| 331 | Marine algae | 1 | 18 | 376 | 405 |
| 347 | Systems Theory | 1 | 17 | 1.4K | 1.0K |
| 347 | Ecological Engineering | 2 | 17 | 415 | 1.0K |
| 347 | Electronics | 1 | 17 | 6.4K | 5.7K |
| 347 | Biological Systems | 1 | 17 | 1.7K | 1.8K |
| 347 | Social Systems | 1 | 17 | 497 | 333 |
| 347 | Computational Complexity | 1 | 17 | 1.8K | 1.5K |
| 347 | System analysis | 1 | 17 | 4.4K | 4.2K |
| 347 | Radiation effects | 1 | 17 | 564 | 810 |
| 355 | Forest Management | 2 | 16 | 743 | 1.2K |
| 356 | Applied Mathematics | 2 | 15 | 1.5K | 1.3K |
| 356 | Engineering Economics | 1 | 15 | 225 | 176 |
| 356 | Health Policy | 1 | 15 | 5.0K | 5.3K |
| 356 | lasers | 1 | 15 | 3.6K | 3.3K |
| 360 | Earthquake Engineering | 2 | 14 | 1.2K | 1.8K |
| 360 | Aerosols | 2 | 14 | 553 | 992 |
| 362 | Cytogenetics | 1 | 13 | 3.2K | 4.0K |
| 362 | Heterocyclic chemistry | 1 | 13 | 1.2K | 1.0K |
| 362 | fuel cells | 4 | 13 | 1.3K | 2.6K |
| 362 | Detectors | 1 | 13 | 2.9K | 3.0K |
| 362 | Heterocyclic compounds | 1 | 13 | 1.9K | 1.9K |
| 362 | investigative techniques | 1 | 13 | 322 | 511 |
| 368 | Parallel Processing | 1 | 12 | 768 | 1.0K |
| 368 | Electrochemical Analysis | 1 | 12 | 1.9K | 2.3K |
| 368 | Pacific Islands | 1 | 12 | 831 | 881 |
| 368 | disease outbreaks | 1 | 12 | 1.3K | 1.8K |
| 372 | Agronomy | 2 | 11 | 906 | 1.6K |
| 372 | Ecohydrology | 2 | 11 | 501 | 967 |
| 372 | Finite Element Method | 1 | 11 | 244 | 301 |
| 372 | Crystal growth | 1 | 11 | 1.9K | 2.3K |
| 372 | body temperature | 1 | 11 | 732 | 1.1K |
| 372 | Agriculture | 2 | 11 | 3.3K | 4.5K |
| 378 | Agricultural Science | 1 | 10 | 192 | 362 |
| 378 | Solid State Physics | 2 | 10 | 4.7K | 5.9K |
| 378 | Mineralogy | 1 | 10 | 2.5K | 2.8K |
| 378 | Environmental hydraulics | 1 | 10 | 48 | 71 |
| 378 | Bioremediation | 2 | 10 | 889 | 2.0K |
| 378 | Water chemistry | 1 | 10 | 944 | 1.2K |
| 378 | Textile industry | 1 | 10 | 1.1K | 1.1K |
| 385 | Emergency Medical Services | 1 | 9 | 2.2K | 2.5K |
| 385 | Biomass Energy | 1 | 9 | 3.7K | 4.5K |
| 385 | Entropy | 5 | 9 | 1.0K | 2.5K |
| 385 | Shock Waves | 1 | 9 | 426 | 531 |
| 389 | Optics | 3 | 8 | 5.3K | 6.8K |
| 389 | Solid State Chemistry | 1 | 8 | 3.0K | 3.6K |
| 389 | Earthquakes | 1 | 8 | 808 | 985 |
| 389 | Ventilation | 2 | 8 | 851 | 1.7K |
| 389 | Amphibians | 4 | 8 | 239 | 561 |
| 389 | Reptiles | 4 | 8 | 274 | 678 |
| 395 | Artificial Intelligence | 2 | 7 | 5.0K | 7.0K |
| 395 | Information Retrieval | 1 | 7 | 964 | 1.3K |
| 397 | Social Sciences | 1 | 6 | 7.1K | 7.1K |
| 397 | Humanities | 1 | 6 | 3.9K | 3.5K |
| 397 | Paleontology | 1 | 6 | 2.3K | 2.8K |
| 397 | Structural design | 2 | 6 | 863 | 1.6K |
| 397 | Geosynthetics | 1 | 6 | 343 | 489 |
| 397 | Image Processing | 2 | 6 | 2.8K | 4.3K |
| 397 | visualization | 6 | 6 | 1.5K | 3.2K |
| 397 | optical pattern recognition | 1 | 6 | 337 | 412 |
| 405 | Landscape Ecology | 1 | 5 | 995 | 1.5K |
| 405 | Herpetology | 1 | 5 | 695 | 859 |
| 405 | Adhesion | 1 | 5 | 1.1K | 1.6K |
| 405 | Microwaves | 2 | 5 | 2.0K | 2.8K |
| 405 | adhesives | 1 | 5 | 1.2K | 1.7K |
| 410 | Electrical Engineering | 4 | 4 | 3.8K | 6.3K |
| 410 | Avionics | 1 | 4 | 351 | 539 |
| 410 | Mathematical Physics | 1 | 4 | 4.6K | 4.7K |
| 410 | Simulation Methods | 1 | 4 | 1.0K | 1.5K |
| 410 | Marine Geophysics | 1 | 4 | 559 | 870 |
| 410 | Crisis management | 1 | 4 | 407 | 615 |
| 410 | Australia | 1 | 4 | 4.1K | 5.3K |
| 417 | Planetary Science | 1 | 3 | 948 | 1.3K |
| 417 | Sustainable Engineering | 1 | 3 | 3.0K | 4.2K |
| 417 | Nanoelectronics | 1 | 3 | 1.1K | 1.6K |
| 417 | Quality Control | 2 | 3 | 2.4K | 4.5K |
| 417 | air quality management | 1 | 3 | 854 | 1.6K |
| 417 | energy conservation | 1 | 3 | 3.1K | 4.4K |
| 417 | Animal ecology | 2 | 3 | 1.7K | 3.1K |
| 417 | indoor air pollution | 1 | 3 | 943 | 1.7K |
| 417 | aquatic insects | 1 | 3 | 216 | 342 |
| 417 | China | 1 | 3 | 5.1K | 6.8K |
| 417 | Sick building syndrome | 1 | 3 | 943 | 1.7K |
| 417 | tomography | 1 | 3 | 952 | 1.3K |
| 417 | Semiconductor industry | 1 | 3 | 321 | 654 |
| 417 | Meteorites | 1 | 3 | 946 | 1.4K |
| 431 | Mobile Computing | 3 | 2 | 1.3K | 3.0K |
| 431 | Production Engineering | 1 | 2 | 3.4K | 4.5K |
| 431 | Operations Research | 1 | 2 | 3.4K | 4.6K |
| 431 | Wireless Communication Systems | 3 | 2 | 2.6K | 4.8K |
| 431 | Accreditation | 1 | 2 | 263 | 499 |
| 431 | ceramic engineering | 5 | 2 | 51 | 204 |
| 431 | Commercial vehicles | 1 | 2 | 45 | 47 |
| 438 | Surveying | 1 | 1 | 362 | 572 |
| 438 | Naval Architecture | 1 | 1 | 930 | 1.2K |
| 438 | Fishery management | 1 | 1 | 1.4K | 2.2K |
| 438 | insurgency | 1 | 1 | 178 | 360 |
| 438 | Hydrodynamics | 1 | 1 | 770 | 1.3K |
| 438 | Wildlife conservation | 1 | 1 | 1.7K | 2.7K |
| 438 | Quality Assurance | 1 | 1 | 778 | 1.6K |
| 438 | landscapes | 1 | 1 | 449 | 873 |
| 438 | Soil | 1 | 1 | 356 | 727 |
| 438 | exobiology | 1 | 1 | 780 | 1.2K |
| 438 | Biometrics | 1 | 1 | 2.2K | 3.2K |
| 438 | irrigation | 1 | 1 | 760 | 1.3K |
| 438 | drainage | 1 | 1 | 631 | 1.1K |
| 438 | Decision making | 1 | 1 | 3.3K | 5.1K |
| 438 | Uncertainty | 1 | 1 | 405 | 685 |
| 438 | Aquaculture | 1 | 1 | 2.0K | 3.0K |
| 454 | Nanochemistry | 1 | 0 | 2.3K | 3.5K |
| 454 | Energy Policy | 1 | 0 | 3.1K | 4.9K |
| 454 | Signal Processing | 1 | 0 | 3.9K | 5.7K |
| 454 | Neural circuitry | 1 | 0 | 2.9K | 4.4K |
| 454 | Radio wave propagation | 1 | 0 | 1.8K | 2.7K |
| 454 | Noise control | 1 | 0 | 667 | 514 |
| 454 | plasma spraying | 2 | 0 | 377 | 966 |
| 454 | Telecommunication | 1 | 0 | 4.4K | 6.0K |
| 454 | Building | 1 | 0 | 1.2K | 2.0K |
| 454 | Societies | 1 | 0 | 602 | 967 |
| 454 | Social behavior | 1 | 0 | 2.2K | 3.6K |
| 454 | energy resources | 1 | 0 | 1.4K | 2.4K |
| 454 | mathematical concepts | 1 | 0 | 948 | 1.6K |
