Related by context. Frequent words. (Click for all words.) 58 watercourse 57 Hurunui 56 Catchment 56 Tongariro 56 catchment 55 Murrumbidgee River 55 Ohau 55 Lake Rotoiti 54 rivers 54 catchments 53 watercourses 53 Manukau Harbour 53 Hawea 52 Waitaki River 52 Waimakariri River 51 Clutha River 51 estuary 51 Lake Tekapo 51 weirs 50 waterways 50 Fitzroy River 49 weir 49 cumecs 49 Waimarama 49 Salinity 49 Waiau 49 drainages 48 Great Dividing Range 48 Coromandel Peninsula 48 creeks 48 effluent discharge 48 Waimakariri 48 Esk 47 Tolaga Bay 47 ECan 47 Clutha 47 tributary 47 Takaka 47 Waikato Tainui 47 landslip 47 stormwater drain 47 Murrumbidgee 47 river 46 Skeena River 46 Waitaki 46 Gordonvale 46 Lake Hawea 46 Mahia 46 spawning beds 46 Whanganui River 46 Cooloola 46 Coorong 46 Dirranbandi 46 reed beds 46 Waitakere Ranges 46 Environment Waikato 46 Rakaia 45 Escarpment 45 Pukerua Bay 45 Haumoana 45 Sluice 45 Nyando 45 birdlife 45 coulees 45 headwater 45 foreshores 45 sewage discharges 45 dam 45 flood alleviation 45 billabong 45 tributaries 45 riverbanks 45 groynes 45 rivers creeks 45 outfall 45 foreshore 45 Campaspe 45 River tributary 45 Maketu 44 watersheds 44 saltmarsh 44 wetland 44 Waikouaiti 44 Robinvale 44 lakes 44 Estuary 44 aquatic ecosystem 44 aquatic ecosystems 44 creek 44 outfalls 44 runanga 44 Warrego 44 siltation 44 Ohope 44 Goolwa 44 Menindee Lakes 44 River Ouse 44 Ghaggar 44 stormwater drains 44 Rangitikei 44 sewage effluent