Legend (National/Our_Estuaries)

Chlorophyll-a (3) <0.0009 0.0009 - 0.0015 0.0015 - 0.0024 >0.0024 Visual clarity (4) >1.069 1.069 - 1.650 1.650 - 6.027 <6.027 Dissolved oxygen (5) <7.553 7.553 - 7.939 7.939 - 8.567 >8.567 Dissolved reactive phosphorus (6) <0.008 0.008 - 0.012 0.012 - 0.020 >0.020 Enterococci (7) <2.152 2.152 - 5.333 5.333 - 12.049 >12.049 Faecal coliforms (8) <3.130 3.130 - 8.044 8.044 - 28.313 >28.313 Ammoniacal nitrogen (9) <0.011 0.011 - 0.018 0.018 - 0.031 >0.031 Nitrate-nitrite nitrogen (10) <0.010 0.010 - 0.020 0.020 - 0.055 >0.055 Suspended solids (11) <6.325 6.325 - 11.949 11.949 - 17.325 >17.325 Total phosphorus (12) >0.018 0.018 - 0.030 0.030 - 0.043 <0.043 Total nitrogen (13) <0.130 0.131 - 0.203 0.203 - 0.255 >0.255 Turbidity (14) >3.180 3.180 - 5.016 5.016 - 7.500 <7.500 Chlorophyll-a (16) Improving Worsening Indeterminate Visual clarity (17) Improving Worsening Insufficient data Dissolved oxygen (18) Improving Worsening Indeterminate Dissolved reactive phosphorus (19) Improving Worsening Indeterminate Enterococci (20) Improving Worsening Indeterminate Faecal coliforms (21) Improving Worsening Indeterminate Ammoniacal nitrogen (22) Improving Worsening Indeterminate Nitrate-nitrite nitrogen (23) Improving Worsening Indeterminate Suspended solids (24) Improving Worsening Indeterminate Total phosphorus (25) Improving Worsening Indeterminate Total nitrogen (26) Improving Worsening Indeterminate Turbidity (27) Improving Worsening Indeterminate River water quality - total nitrogen - trends (30) Very likely improving Likely improving Indeterminate Likely worsening Very likely worsening River water quality - total nitrogen - trends (31) Very likely improving Likely improving Indeterminate Likely worsening Very likely worsening River water quality - total nitrogen - trends (32) Very likely improving Likely improving Indeterminate Likely worsening Very likely worsening River water quality - nitrate-nitrogen - trends (34) Very likely improving Likely improving Indeterminate Likely worsening Very likely worsening River water quality - nitrate-nitrogen - trends (35) Very likely improving Likely improving Indeterminate Likely worsening Very likely worsening River water quality - nitrate-nitrogen - trends (36) Very likely improving Likely improving Indeterminate Likely worsening Very likely worsening River water quality - ammoniacal nitrogen - trends (38) Very likely improving Likely improving Indeterminate Likely worsening Very likely worsening River water quality - ammoniacal nitrogen - trends (39) Very likely improving Likely improving Indeterminate Likely worsening Very likely worsening River water quality - ammoniacal nitrogen - trends (40) Very likely improving Likely improving Indeterminate Likely worsening Very likely worsening River water quality - total nitrogen - state (41) <0.230 0.230 - 0.515 0.515 - 1.100 >1.100 River water quality - nitrate-nitrogen - state (42) <0.071 0.071 - 0.285 0.285 - 0.760 >0.760 River water quality - ammoniacal nitrogen - state (43) <0.004 0.004 - 0.008 0.008 - 0.014 >0.014 Zinc (45) Above DGV Below DGV NA Lead (46) Above DGV Below DGV Copper (47) Above DGV Below DGV Cadmium (48) Above DGV Below DGV NA Observed streambed sedimentation (1990-2011) (50) 0.000000 - 5.909091 5.909092 - 19.090910 19.090911 - 43.000000 43.000001 - 76.666670 76.666671 - 100.000000 predicted contemporary in-stream sediment cover (52) 0.00 - 10.00 10.01 - 20.00 20.01 - 30.00 30.01 - 40.00 40.01 - 50.00 50.01 - 60.00 60.01 - 70.00 70.01 - 80.00 80.01 - 90.00 90.01 - 100.00 predicted reference in-stream sediment cover (53) 0.00 - 10.00 10.01 - 20.00 20.01 - 30.00 30.01 - 40.00 40.01 - 50.00 50.01 - 60.00 60.01 - 70.00 70.01 - 80.00 80.01 - 90.00 90.01 - 100.00 River flow (54) 0.00 - 36.71 36.72 - 140.15 140.16 - 330.15 330.16 - 669.92 669.93 - 1347.15 Vulnerable catchments (56) Sea-draining catchments (57) Land cover (LCDBv5) (58) Built-up Area (settlement) Surface Mines and Dumps Transport Infrastructure Urban Parkland/Open Space Sand and Gravel Landslide Alpine Grass/Herbfield Gravel and Rock Permanent Snow and Ice Lake or Pond River Estuarine Open Water Short-rotation Cropland Orchard Vineyard and Other Perennial Crops High Producing Exotic Grassland Low Producing Grassland Tall Tussock Grassland Depleted Grassland Herbaceous Freshwater Vegetation Herbaceous Saline Vegetation Flaxland Fernland Gorse and/or Broom Manuka and/or Kanuka Broadleaved Indigenous Hardwoods Sub Alpine Shrubland Mixed Exotic Shrubland Matagouri or Grey Scrub Peat Shrubland (Chatham Is) Dune Shrubland (Chatham Is) Forest - Harvested Deciduous Hardwoods Indigenous Forest Exotic Forest Mangrove Erosion risk - North Island (60) High landslide risk - delivery to stream High landslide risk - non delivery to stream Moderate earthflow risk Severe earthflow risk Gully risk Erosion risk - South Island (61) High landslide risk - delivery to stream High landslide risk - non delivery to stream Moderate earthflow risk Severe earthflow risk Gully risk Natural river and stream cover (62) 0.0 - 0.1 0.1 - 0.2 0.2 - 0.3 0.3 - 0.4 0.4 - 0.5 0.5 - 0.6 0.6 - 0.7 0.7 - 0.8 0.8 - 0.9 0.9 - 1.0 Human pressures on rivers and streams (63) 0.0 - 0.1 0.1 - 0.2 0.2 - 0.3 0.3 - 0.4 0.4 - 0.5 0.5 - 0.6 0.6 - 0.7 0.7 - 0.8 0.8 - 0.9 0.9 - 1.0 Mangroves (65) High, >50% Medium, 20-50% Low, <20% Present Seagrass (66) High, >50% Med, 20-50% Low, <20% Present Inanga spawning sites (67) Ecological districts (69) Estuaries environment classification - types 2007 (71) Coastal lake Coastal lagoon Tidal lagoon Hapua Tidal creek Tidal mouth Tidal river Coastal embayment Small coastal embayment Drowned valley Drowned valley system Drowned valley or sound Sound Fjord Estuaries environment classification - grouped 2007 (72) Freshwater - Hapua Estuarine - Coastal embayment Estuarine - Coastal lagoon Estuarine - Coastal lake Estuarine - Fjord Estuarine - Small coastal embayment Estuarine - Tidal creek Estuarine - Tidal lagoon Estuarine - Tidal mouth Estuarine - Tidal river Marine - Drowned valley Marine - Drowned valley or sound Marine - Drowned valley system Marine - Sound Coastal hydrosystem classification (polygons) (74) 1. Damp sand plain lake 2. Waituna-type lagoon 3. Hapua-type lagoon 4. Beach stream 5. Freshwater river mouth 6. Tidal river mouth 7. Tidal lagoon 8. Shallow drowned valley 9. Deep drowned valley 10. Fjord 11. Coastal embayment Coastal hydrosystem classification (point data) (75) 1. Damp sand plain lake 2. Waituna-type lagoon 3. Hāpua-type lagoon 4. Beach stream 5. Freshwater river mouth 6. Tidal river mouth 7. Tidal lagoon 8. Shallow drowned valley 9. Deep drowned valley 10. Fjord 11. Coastal embayment Marine habitats (76) Mudflat Estuarine Mud Shallow Mud High Current Shallow Mud Deep Mud High Current Deep Mud Estuarine Beach Sheltered Beach Moderate Beach Exposed Beach High Current Beach Estuarine Sand Sheltered Shallow Sand Moderate Shallow Sand Exposed Shallow Sand High Current Shallow Sand Deep Sand High Current Deep Sand Estuarine Gravel Sheltered Shallow Gravel Moderate Shallow Gravel Exposed Shallow Gravel High Current Shallow Gravel Deep Gravel High Current Deep Gravel Estuarine Reef Sheltered Shallow Reef Moderate Shallow Reef Exposed Shallow Reef High Current Shallow Reef Deep Reef High Current Deep Reef Estuarine Rocky Shore Sheltered Rocky Shore Moderate Rocky Shore Exposed Rocky Shore High Current Rocky Shore Biogenic Spirits Bay Biogenic Silt/Bryozoan Mounds Biogenic Serpulid worm patch reefs Galeolaria hystrix Biogenic Seagrass Above MHW Biogenic Seagrass Biogenic Saltmarsh Above MHW Biogenic Saltmarsh Biogenic Rhodoliths Biogenic Mussel Biogenic Mangrove Above MHW Biogenic Mangrove Biogenic Low relief biogenic reef Biogenic High relief biogenic reef Biogenic Green-lipped mussel Biogenic Dog cockles Biogenic Bryozoans Exposed Shallow Volcanic Moderate Shallow Volcanic Deep Volcanic Upper Slope Mid Slope Lower Slope Estuarine Current wetland extent (2013) (78) Historical wetland extent (79) Mean high water springs (81) Bathymetry (depth) (82) -4.8 -4.2 -4.1 -4 -3.6 -3.5 -3.4 -3.3 -3.2 -3.1 -3 -2.9 -2.8 -2.7 -2.6 -2.5 -2.4 -2.3 -2.2 -2.1 -2 -1.9 -1.8 -1.7 -1.6 -1.5 -1.2 -0.9 0 2 5 10 20 30 50 100 200 400 500 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000