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(Click for frequent words.) 75 river basin 71 River basin 70 rivers 67 reservoirs 67 tributaries 66 watersheds 64 river drainages 63 River Basin 62 basins 61 basin 60 headwaters 60 dams 59 streamflow 59 aquifers 59 headwater 59 lakes 59 freshwater 58 catchments 58 irrigated agriculture 58 Ogallala aquifer 57 tributary rivers 56 hydrological 56 Ganges Brahmaputra 56 tributary streams 56 tributary 55 mussel species 55 groundwater aquifers 55 river catchments 55 streamflows 55 Elephant Butte Reservoir 55 aquifer 55 hydrologic 55 groundwater 54 mainstem 54 Reservoirs 54 groundwater basins 54 Condamine Balonne 54 river deltas 54 forested watersheds 53 Snowpacks 53 upstream reservoirs 53 groundwater withdrawals 53 drainage basins 53 watershed 53 groundwater aquifer 53 aquifer recharge 52 estuaries 52 Nile basin 52 underground aquifers 52 undammed river 52 ecoregions 52 overappropriated 52 groundwater recharge 52 Yangtze rivers 52 Water Resources 52 river valleys 52 irrigated farmland 51 creeks 51 drainage basin 51 severe droughts 51 arid regions 51 semiarid regions 51 riparian 51 hydro electric dams 51 Ogallala Aquifer 51 freshwater habitats 51 tailwaters 51 River Basins 51 Aquifers 51 Brahmaputra River 51 Palisades Reservoir 51 Basin snowpack 51 ecoregion 51 Tarim River 51 Zambezi basin 50 catchment 50 River tributary 50 Klamath basin 50 shallow aquifers 50 Ozark aquifer 50 glacial lakes 50 reservoir 50 Ganga Brahmaputra 50 estuary 50 undammed rivers 50 rainfall 50 acquifer 50 Kiamichi River 50 Shoal Lakes 50 IWRM 50 Loddon Avoca 50 snowpacks 50 wetland ecosystems 50 transboundary 50 Transboundary 50 Apalachicola Chattahoochee Flint 50 Upper Snake River 50 Menindee Lakes 49 headwater stream 49 interbasin transfers 49 trans boundary 49 Soil moisture 49 salinity 49 hydrological cycle 49 groundwater pumping 49 oxbows 49 subglacial lakes 49 waterways 49 headwater streams 49 snowmelt runoff 49 hydropower dams 49 Indus basin 49 Ozark Aquifer 49 hydroelectric dams 49 Allatoona Lake 49 Umatilla Basin 49 semi arid regions 49 eutrophic 49 juvenile salmonids 49 Sites Reservoir 49 Meghna basin 49 coral ecosystems 49 Aquifer 48 river 48 hydropower 48 Equus Beds aquifer 48 upper riparian 48 Chenab rivers 48 freshwater ecosystems 48 dam 48 aquatic ecosystem 48 Alabama Coosa Tallapoosa 48 instream flows 48 Floridan aquifer 48 hydrologists 48 Mangla dams 48 humpback chub 48 Snake River Basin 48 Streamflows 48 streamgages 48 mightiest rivers 48 mountain snowpack 48 freshwater lakes 48 endangered silvery minnow 48 wolverine habitat 48 maf 48 Salinity 47 hydropower plants 47 springsnail 47 agro ecological zones 47 floodplain 47 Waitaki catchment 47 trout streams 47 hydro dams 47 wetlands 47 tailwater 47 Brahmaputra rivers 47 irrigators 47 Omo River 47 semi arid 47 Dams 47 hydrological drought 47 drainages 47 Soil moisture levels 47 wetland 47 Apalachicola Chattahoochee 47 transboundary waters 47 Great Ruaha 47 Hydrological 47 irrigable land 47 freshwater fish 47 snowpack 47 Dr Craik 47 coastal estuaries 47 mussel populations 47 transmountain diversions 47 Snake River Plain Aquifer 47 Snowpack 47 Ewaso Nyiro 47 Fryingpan Arkansas Project 47 ecosystems 47 water 47 blackwater streams 47 endangered mussels 47 riparian zones 47 assimilative capacity 47 brook lamprey 47 Boysen Reservoir 47 shallow aquifer 47 deep convective clouds 47 mountain snowpacks 47 freshwater aquifers 47 freshwater mussels 47 bedrock aquifers 47 Snake Plain Aquifer 47 Syr Darya 47 haors 47 freshwater estuary 47 razorback suckers 47 River Watershed 47 Mekong Basin 47 Snotel sites 47 Mekong basin 46 drylands 46 bioregions 46 irrigated crops 46 playa lakes 46 groundwater basin 46 arid semi arid 46 Prolonged droughts 46 hydrology 46 mountain glaciers 46 embayments 46 Upper Klamath 46 Macquarie Marshes 46 Watersheds 46 rivers estuaries 46 basinwide 46 glacial melt 46 hydroelectric plants 46 Sutlej rivers 46 Gangotri glacier 46 riparian habitats 46 biodiversity hotspots 46 Zambezi Basin 46 Irrigated agriculture 46 native brook trout 46 Banklick Creek 46 biodiversity hotspot 46 Great Artesian Basin 46 Kariba Dam 46 Coorong wetlands 46 Snake River Plain 46 estuarine 46 Beas rivers 46 bankfull 46 Snake River dams 46 subwatershed 46 Olifants River 46 Severe drought 46 Huai river 46 shortnose sturgeon 46 interstate compacts 46 brook trout populations 46 agriculturally productive 46 Ganges Indus 46 Snoqualmie rivers 46 manmade reservoirs 46 Streamflow 46 storages 46 Loch Lomond Reservoir 46 Sheyenne rivers 46 cumecs 46 deltaic 46 semiarid 46 Cahora Bassa dam 46 rivers lakes 46 refugia 46 #GL [002] 46 Hirakud reservoir 46 Groundwater 46 Basin 46 Watershed 46 biosphere reserves 46 Ganga basin 46 Pathfinder Reservoir 46 streamflow forecasts 46 Bullards Bar 46 melting snowpack 46 lake 45 floodplains 45 Tallapoosa rivers 45 bottomland forests 45 Lake Lanao 45 Fryingpan River 45 km3 45 navigable rivers 45 rangelands 45 alluvial aquifer 45 Creek tributary 45 cfs 45 waterbirds 45 Indus Jhelum 45 aquatic ecosystems 45 ponderosa pine forests 45 tidally influenced 45 Kotri barrage 45 irrigated lands 45 Meghna rivers 45 Cuvelai 45 species 45 BuRec 45 hydroelectric 45 increased storminess 45 megadrought 45 Biscayne Aquifer 45 Brahmaputra Jamuna 45 subtropical regions 45 wetland ecosystem 45 Great Lakes basin 45 lowland flooding 45 airsheds 45 cubic hectometres 45 Sierra snowpack 45 Kittitas Yakima 45 Cahora Bassa Dam 45 Yangtze Mekong 45 climatic variability 45 deltas 45 westslope cutthroat trout 45 hydrologically 45 nutrient inputs 45 Pueblo Reservoir 45 Ramsar Site 45 TMDLs 45 irrigate farmland 45 depleting aquifers 45 Lake Champlain basin 45 saturated catchments 45 Lake Koocanusa 45 freshwater wetlands 45 sturgeon spawning 45 Friant Kern Canal 45 Yadkin river basins 45 underground aquifer 45 prairie pothole region 45 freshwater fishes 45 Tar Pamlico 45 David Dreverman 45 rainfalls 45 droughts 45 Murray Darling Basin 45 trout hatcheries 45 instream flow 45 fisheries 45 Murrumbidgee River 45 Drought Mitigation Center 45 Bull Shoals Norfork 45 waterfowls 45 Xe Bang Fai 45 Lower Mekong 45 Freshwater mussels 45 Yellowtail Dam 45 aquatic fauna 45 Groundwater Basin 45 Huaihe 45 cyanobacterial blooms 45 subbasin 45 freshwater lake 45 rivers creeks 45 Siberian Traps 44 fishable 44 Huaihe river 44 Brahmaputra basin 44 Colorado pikeminnow 44 Pardeeville dam 44 Paroo River 44 riverways 44 megapolitan 44 groundwater depletion 44 Reservoir 44 tributary creeks 44 fluvial 44 Wivenhoe Somerset 44 Natural Resources IUCN 44 Snake River salmon 44 shovelnose sturgeon 44 Floodplains 44 habitat 44 Overflowing rivers 44 threatened coho salmon 44 peat swamps 44 Satluj river 44 wild sockeye salmon 44 Ocklawaha rivers 44 Arsenic contamination 44 stream gages 44 saugers 44 threatened delta smelt 44 nitrogen deposition 44 downstream Kotri 44 Pejar Dam 44 soil moistures 44 deforestation desertification 44 Indus river 44 tributary reservoirs 44 Wivenhoe catchment 44 Gunnison Basin 44 brackish groundwater 44 Threadfin shad 44 Zambezi river 44 coulees 44 Sparta aquifer 44 MoRAST 44 WMAs 44 glaciers 44 Klamath chinook 44 bottomland hardwood forest 44 threatened Delta smelt 44 deepwater corals 44 Clay Craighead Crittenden 44 redband trout 44 biologically diverse 44 hellbender 44 Chino aquifer 44 bull trout 44 grizzly populations 44 lowlands 44 Ganges Yangtze 44 unlogged forests 44 saline intrusion 44 frequent droughts 44 precipitation 44 inland lakes 44 #cfs [002] 44 Huaihe River 44 stationary frontal boundary 44 Hulah 44 freshwater aquifer 44 aquifer depletion 44 Drought Monitor 44 Ramsar sites 44 Fork Reservoir 44 Letsibogo Dam 44 aquatic habitats 44 Cheesman Reservoir 44 Interbasin Compact Committee 44 prairie potholes 44 rivers overflowed 44 rainfed agriculture 44 nitrate concentrations 44 sedimentation 44 Yangtze basin 44 mega deltas 44 Englebright Dam 44 endangered suckers 44 Heavier rains 44 Bhima river 44 Rio Grande silvery minnow 44 forests 44 Jonglei Upper 44 razorback sucker 44 Rotorua lakes 44 La Niñas 44 riparians 44 anadromous fish 44 megafloods 44 Sierra snowmelt 44 Middle Fork 44 Yangtze Yellow 44 spawning tributaries 44 Xiangjiang River 44 dam removals 44 wellfields 44 Campaspe rivers 44 Precipitation totals 43 irrigate crops 43 watercourses 43 McClusky Canal 43 Angat dam 43 rapid snowmelt 43 Gandak 43 seawater intrusion 43 riparian habitat 43 riparian corridors 43 impoundments 43 driest 43 silvery minnow 43 Pepacton 43 biogeochemical processes 43 flood crests 43 hydrologically connected 43 Apalachicola River 43 Pardee Reservoir 43 ocean basins 43 cumec 43 watermaster 43 hydro lakes 43 feeder creeks 43 Abundant rainfall 43 hydrologist 43 River 43 beels 43 sea turtle species 43 Cannonsville 43 depleted aquifers 43 Chattahoochee Flint 43 gigalitres 43 terrestrial ecosystems 43 Methow River 43 forested lands 43 coastal bays 43 Victorian irrigators 43 Ganges Brahmaputra Meghna 43 hydrograph 43 Poyang Lake 43 catchment areas 43 streamside habitat 43 Basins 43 irrigation 43 reservoirs upstream 43 Lake Balkhash 43 shortgrass prairie 43 aquatic habitat 43 Upper Floridan Aquifer 43 Murray Darling 43 Yellow Huaihe 43 estuarine ecosystems 43 Siltation 43 bottomland 43 salinisation 43 Siskiyou counties 43 Hinckley Reservoir 43 Mtera dam 43 Borumba Dam 43 migratory bird habitats 43 waterbird species 43 Intersex fish 43 Sutlej Beas 43 salinity intrusion 43 waterfowl habitat 43 eastern Dakotas 43 Atchafalaya River Basin 43 bioregion 43 National Scenic Riverways 43 Parana River 43 Lancang River 43 cropland 43 soil moisture 43 Dam 43 kokanee salmon 43 flowages 43 Tallowa 43 Tolt River 43 Navajo Reservoir 43 watercourse 43 Bighorn River 43 Haihe River 43 nutrient loadings 43 Burhi Gandak 43 oxbow 43 flowage 43 Godavari Krishna 43 pike minnow 43 lowland 43 Saskatchewan Watershed 43 Goulburn Broken 43 Tropical rainforests 43 instream 43 Narran Lakes 43 oceans coasts 43 Kompoltowicz 43 Coho salmon 43 physiographic 43 Hydroelectric dams 43 glaciers retreated 43 Jhelum Chenab 43 damming rivers 43 Reclamation 43 alluvial soils 43 Catchment 43 waterbodies 43 Hardap Dam 43 creeping northward 43 Upper Klamath Basin 43 regions 43 Lancang Mekong River 43 spring snowmelt runoff 43 chloride concentrations 43 abnormally dry 43 SNOTEL sites 43 Cultus Lake sockeye 43 Tombigbee rivers 43 biomes 43 Dalles Dam 43 grasslands 43 Muscatatuck River 43 MDBC 43 arid lands 43 Madrid Seismic Zone 43 David Stooksbury 42 Lancang rivers 42 wintering habitat 42 habitats 42 Snake rivers 42 benthos 42 peninsular rivers 42 subsoil moisture 42 headwater chub 42 wetland restoration 42 Indo Gangetic plains 42 Roadless areas 42 Drought Monitor map 42 salmonid species 42 Alluvial Aquifer 42 sedimentary basins 42 Albeni Falls Dam 42 hypoxic zone 42 locust infestations 42 roundtail chub 42 Sedimentation 42 Ruedi Reservoir 42 biologically diverse regions 42 gambusia 42 Yeongsan 42 Arunachal Pradesh Assam 42 Elevenmile 42 river Kosi 42 Skykomish rivers 42 outfalls 42 Seminoe Reservoir 42 interbasin transfer 42 hydro electric 42 Skeena Nass 42 Ethiopian highlands 42 IWMI 42 Boreal forests 42 coastlands 42 blanket bog 42 sediments deposited 42 waterway 42 swollen Huaihe River 42 acquifers 42 riparian forest 42 recharge basins 42 flood plains 42 Brownlee Reservoir 42 Sydney Harbours 42 State Climatologist 42 Volta Basin 42 Amundsen Sea 42 transmountain 42 hydroelectricity 42 Piru Creek 42 Lake McConaughy 42 Gangetic dolphins 42 rainbow trout fishery 42 CRMWD 42 karst 42 Warm Springs Dam 42 Luckiamute 42 hydro meteorological 42 drought stricken 42 killifish 42 hydro electric power 42 Sutlej river 42 greenstone belts 42 topsoil moisture 42 Three Gorges Reservoir 42 brown trout spawn 42 Hawkesbury Nepean 42 Cheoah River 42 overpumped 42 tidal inlets 42 riparian corridor 42 speckled dace 42 waterbody 42 Mesopotamian Marshlands 42 Amazon basin 42 Hindu Kush Himalayan 42 migratory bird populations 42 migratory waterbirds 42 Glendo Reservoir 42 Damming 42 Everglades ecosystem 42 spawning habitat 42 riverine forests 42 Rio Conchos 42 Belle Fourche Reservoir 42 oligotrophic 42 Kakanui River 42 coldwater fisheries 42 Flaming Gorge Dam 42 drenching springs 42 Hindu Kush Himalayas 42 freshwater snails 42 wild brook trout 42 Ice jams 42 Youghiogheny rivers 42 overthrust belt 42 overallocated 42 Obleski 42 navigable waterways 42 nontidal 42 diversion weir 42 biodiverse 42 carbon fluxes 42 sagebrush ecosystem 42 Nile Basin 42 backwater lakes 42 Thurmond Dam 42 seaboards 42 Granby Reservoir 42 longfin smelt 42 Bogachiel Calawah 42 peat swamp forest 42 Yadkin Pee Dee 42 catchable trout 42 coastal inundation 42 Floridan Aquifer 42 biodiversity 42 El Niño winters 42 populous Front Range 42 Basin pygmy rabbit 42 muskie lakes 42 Pompton rivers 42 atmospheric ozone 42 Mettur reservoir 42 walleye fishery 42 freshwater mussel 42 tmcft 42 Lake Glenmaggie 42 overgrazing deforestation 42 Creek Watershed 42 prolonged drought 42 Lahontan cutthroat 42 Namakan 42 McNary Dam 42 forest ecosystems 42 megadroughts 42 Dr Trewin 42 Delta Smelt 42 Hydrologists 42 Yolo Bypass 42 landmass 42 Blackfoot rivers 42 irrigational 42 Sudd 42 Equus Beds 42 oxbow lakes 42 Euphrates Tigris 42 McPhee Reservoir 42 mountain snowmelt 42 Indus River 42 Harmful algal blooms 42 shovelnose 42 Melones Dam 42 hydrographic basins 42 Han Nakdong Geum 42 tailrace 42 Little Assawoman Bay 42 Snowmelt 42 groundwaters 42 hydro electric dam 42 endangered pallid sturgeon 42 migratory bird habitat 42 toxic algal blooms 42 croplands 42 lowland forest 42 Ganges Padma 42 Prolonged drought 42 Amazonian forest 42 Hinze Dam 42 Rain swollen rivers 42 chinooks 42 Droughts 41 Taihu Lake 41 aquatic organisms 41 greenback cutthroat trout 41 delta smelt 41 Yangtze tributary 41 Pallid sturgeon 41 polluted stormwater runoff 41 Carrizo Wilcox 41 coldwater streams 41 underground Ogallala aquifer 41 bays estuaries 41 Sutlej Ravi 41 Ukai dam 41 freshwater streams 41 transboundary rivers 41 wadeable 41 Kotri Barrage 41 polluted rivers 41 Agusan River 41 climatic variations 41 Dworshak Reservoir 41 Glacial Lake 41 Water Conservancy 41 mesic 41 Prakasam barrage 41 Upper Vaitarna 41 snowmelt 41 groundwater pumpers 41 boreal toad 41 Jocassee 41 Klamath salmon 41 Okavango River 41 fat threeridge mussel 41 Almatti reservoir 41 peat lands 41 migratory bird species 41 salars 41 Santa Ana sucker 41 spatial scales 41 Atchafalaya rivers 41 hatcheries 41 Indus Ganges 41 desertification 41 Lahontan Reservoir 41 glacier retreat 41 riparian ecosystems 41 USGS hydrologist 41 naturally occurring arsenic 41 Fry Ark 41 Ramsar wetlands 41 dissolved oxygen levels 41 Gangetic plains 41 evapo transpiration 41 lake sturgeon 41 dikes dams 41 grassland ecosystems 41 Gnangara Mound 41 Chute Bayou 41 Trinity Aquifer 41 Flathead Basin 41 seacoasts 41 coastal waters 41 pollute groundwater downstream 41 gigalitre 41 freshwater ponds 41 Sparta Aquifer 41 gigaliters 41 riparian forests 41 Des Lacs River 41 coldwater species 41 Wetland 41 brown trout 41 saugeye 41 cutthroat trout 41 flood plain 41 prolonged droughts 41 floodway 41 alluvial aquifers 41 Catawba Wateree 41 aquatic species 41 Sluice gates 41 Fontenelle Reservoir 41 Peconic Estuary 41 dekad 41 rainbow smelt 41 salamander species 41 earthen dams 41 Chaohu Lake 41 marine ecosystems 41 Kalu Ganga 41 Vansadhara 41 Farakka Barrage 41 Record rainfalls 41 spikedace 41 Altamaha 41 biota 41 smallmouth bass 41 Holter Dam 41 amphibian species 41 montane forest 41 Araz rivers 41 pallid sturgeon 41 Irrawaddy dolphin 41 rives 41 Rainfall 41 Greater Mekong 41 biosphere reserve 41 heavily polluted 41 transboundary Flathead 41 irrigating crops 41 forebay 41 Fryingpan Arkansas 41 Irtysh 41 heavier rainfalls 41 Tailwaters 41 Seagrasses 41 biogeographical 41 locust upsurge 41 Kokanee salmon 41 biologically diverse ecosystems 41 highly erodable 41 mysis shrimp 41 #mcm 41 CRMWA 41 dammed 41 waterfowl habitats 41 wildlife habitat 41 presettlement 41 Prickly Pear Creek 41 Snake River basin 41 migratory fish 41 Weihe River 41 cultivatable land 41 Magat Dam 41 boreal regions 41 wetland habitats 41 Qu'Appelle River 41 Attabad Lake 41 mountain ranges 41 Cauvery waters 41 Cheoah 41 alluvial deposits 41 Climate Impacts Group 41 ice jams 41 Odessa aquifer 41 temperate grasslands 41 watertable 41 wetland habitat 41 coral reef ecosystems 41 Mississippi Alluvial 41 Linganamakki 41 brook trout 41 mule deer herd 41 geomorphic 41 Seminoe 41 freshwaters 41 Three Gorges reservoir 41 Guntur districts 41 fishery 41 Fairbairn Dam 41 macroinvertebrates 41 Baldhill Dam 41 Mullaperiyar river 41 melting snowpacks 41 warmwater fish 41 River Estuary 41 Subarnarekha 41 Beijiang River 41 Lancang 41 streamside forests 41 Warragamba dam 41 continental rifting 41 Mali Burkina Faso 41 Tenmile Creek 41 lakh cusec 41 arable land 41 lakebeds 41 Wakool River 41 saltwater marshes 41 redhorse suckers 41 tidal wetlands 41 Sriramsagar 41 Liaohe River 41 estuarine habitats 41 Kalmiopsis Wilderness 41 streambanks 41 Snake River sockeye 41 Oklahoma Panhandles 41 Kidatu 41 montane 41 pumpback 41 Burdekin Falls 41 Lake Lanier 41 Palmer Drought Severity 41 Wenlock River 41 Gavins Point 41 nonconsumptive 41 lakeshores 41 Warmer seas 41 temperate forests 41 Anseba 41 brackish Lake Pontchartrain 41 Swollen rivers 41 permafrost degradation 40 overpumping 40 steelhead smolts 40 frog species 40 parched soils 40 Gandak river 40 Dharla 40 Soil erosion 40 Yarlung Zangbo River 40 catchable sized trout 40 semi arid Sahel 40 Miyun reservoir 40 Aral Sea 40 marine sanctuaries 40 Mopeia 40 Varasgaon 40 Googong 40 lakh cusecs 40 Anambra Benue 40 brown trout fishery 40 overexploited 40 Catchments 40 biodiversity conservation 40 Carrizo Wilcox Aquifer 40 inland bays 40 decimated bison herds 40 warmer wetter winters 40 freshwater tidal marsh 40 weirs 40 peatland 40 saltwater estuaries 40 swamps marshes 40 Deschutes Basin 40 abyssal plain 40 salinization 40 bottomland hardwood forests 40 interbasin 40 Shashe Dam 40 Pantabangan Dam 40 Xijiang River