River research in New Zealand is strongly conditioned by management requirements defined by environmental legislation. Principal areas of investigation at present include information on river morphology, habitat and instream flows required for management of fluvial ecosystems; erosion, sediment transport and sediment yield; and gravel-bedded and braided river processes. Research in these areas has tended to have a strong orientation towards field observations as a basis for developing quantitative (commonly statistical) models, and ultimately the provision of guidance material and decision support systems for resource managers. A fourth area of particular emphasis has been channel networks and hydraulic geometry. Again, the work generally has been field-intensive, but has been directed towards testing models such as the optimal channel network concept. Current research directions are focusing particularly on gravel-bed river mechanics, climatic and tectonic controls on landscape evolution, and instream habitat hydraulics and ecosystems.
Biggs, B. J. F.1995: The contribution of flood disturbance, catchment geology and land use to the habitat template of periphyton in stream ecosystems. Freshwater Biology33, 419-438.
2.
Biggs, B. J. F., Duncan, M. J., Jowett, I. G., Quinn, J. M., Hickey, C. W., Davies-Colley, R. J. and Close, M. E.1990: Ecological characterisation, classification, and modelling of New Zealand rivers: an introduction and synthesis. New Zealand Journal of Marine and Freshwater Research24, 277-304.
3.
Carson, M. A.1984: Observations on the meandering-braided river transition, the Canterbury Plains, New Zealand. New Zealand Geographer40, 12-17, 89-99.
4.
Carson, M. A. and Griffiths, G. A.1987: Bedload transport in gravel-bed channels. Journal of Hydrology (NZ)26, 1-51.
5.
Carson, M. A. and Griffiths, G. A.1989: Gravel transport in the braided Waimakariri River: mechanisms, measurements and predictions. Journal of Hydrology109, 201-220.
6.
Carter, G. S. and Shankar, U.1997: Creating rectangular bathymetric grids for environmental numerical modelling of gravel-bed rivers. Applied Mathematical Modelling21, 699-708.
7.
Clausen, B. and Biggs, B. J. F.1997: Relationships between benthic biota and flow indices in New Zealand. Freshwater Biology38, 327-342.
8.
Collier, K. J., Collier, A. B., Davies-Colley, R. J., Rutherford, J. C., Smith, C. M. and Williamson, R. B.1995: Managing riparian zones: a contribution to protecting New Zealand's rivers and streams (2 vols.). Wellington: Department of Conservation.
9.
Collier, K. J. and Wakelin M. D.1995: Instream habitat use by blue duck on Tongariro River. NIWA Science and Technology Series 28. Hamilton: National Institute of Water and Atmospheric Research.
10.
Connell, J. H.1978: Diversity in tropical rain forests and coral reefs. Science199, 1302-1310.
11.
Davies, T. R. H.1997: Long-term management of facilities on an active alluvial fan -Waiho River fan, Westland, New Zealand. Journal of Hydrology (NZ)36, 127-145.
12.
Davies, T. R. H. and Lee, A. L.1988: Physical hydraulic modelling of width reduction and bed level change in braided rivers. Journal of Hydrology (NZ)27, 113-127.
13.
Davoren, A. and Mosley, M. P.1986: Observations of bedload movement, bar development, and sediment supply in the braided Ohau River. Earth Surface Processes and Landforms11, 643-652.
14.
Death, R. G. and Winterbourn, M. J.1995: Diversity patterns in stream benthic invertebrate communities: the influence of habitat suitability. Ecology76, 1446-1460.
15.
Duncan, M. J. and Biggs, B. J. F.1998: Substrate stability vs flood frequency and its ecological implications for headwater streams. In Wheater, H. S. and Kirkby, C., editors, Hydrology in a changing environment. Volume 1, Chichester: Wiley, 347-356.
16.
Duncan, M. J. and Carter, G. S. 1996: Two-dimensional modelling of New Zealand rivers: the NIWA experience. In Proceedings, 24th Hydrology and Water Resources Symposium, Auckland, New Zealand, Wellington: New Zealand Hydrological Society, 493-497.
17.
Eden, D. N. and Page, M. J.1998: Paleoclimatic implications of a storm erosion record from late Holocene lake sediments, North Island, New Zealand. Palaeogeography, Palaeoclimatology, Palaeoecology139, 37-58.
18.
Francoeur, S. N., Biggs, B. J. F. and Lowe, R. L.1998: Microform bed clusters as refugia for periphyton in a flood-prone headwater stream. New Zealand Journal of Marine and Freshwater Research32, 363-374.
19.
Griffiths, G. A.1980: Hydraulic geometry relationships of some New Zealand gravel bed rivers. Journal of Hydrology (NZ)19, 106-118.
20.
Griffiths, G. A.1981: Some suspended sediment yields from South Island catchments, New Zealand. Water Resources Bulletin17, 662-671.
21.
Hayes, J. W. and Jowett, I. G.1994: Microhabitat models of large drift-feeding brown trout in three New Zealand rivers. North American Journal of Fisheries Management14, 710-725.
22.
Henderson, R. D., Ibbitt, R. P. and Duncan, M. J. in press: Cropp River data to test channel network and river basin heterogeneity concepts. Journal of Hydrology (NZ).
23.
Hicks, M. and Davies, T.1997: Erosion and sedimentation in extreme events. In Mosley, M. P. and Pearson, C. P., editors, Floods and droughts: the New Zealand experience, Wellington: New Zealand Hydrological Society, 117-141.
24.
Hicks, D. M., Gomez, B. and Trustrum, N. A. in press: Erosion thresholds and suspended sediment yields: Waipaoa River basin, New Zealand. Water Resources Research.
25.
Hicks, D. M. and Griffiths, G. A.1992: Sediment load. In Mosley, M. P., editor, Waters of New Zealand, Wellington: New Zealand Hydrological Society, 229-248.
26.
Hicks, D. M., Hill, J. and Shankar, U.1996: Variation of suspended sediment yields around New Zealand: the relative importance of rainfall and geology. IAHS Publication236, 149-156.
27.
Hoey, T. B.1994: Patterns of sediment storage in the Kowai River, Torlesse Range, New Zealand. Journal of Hydrology (NZ)32, 1-15.
28.
Ibbitt, R. P.1997: Evaluation of optimal channel network and river basin heterogeneity concepts using measured flow and channel properties. Journal of Hydrology196, 119-138.
29.
Ibbitt, R. P., McKerchar, A. I. and Duncan, M. J.1998: Taieri River data to test channel network and river basin heterogeneity concepts. Water Resources Research34, 2085-2088.
30.
Ibbitt, R. P., Willgoose, G. R. and Duncan, M. J. in press: Channel network simulation compared with data from the Ashley River, New Zealand. Water Resources Research.
31.
Jowett, I. G.1992: Models of the abundance of large brown trout in New Zealand rivers. North American Journal of Fisheries Management12, 417-432.
32.
Jowett, I. G.1995: Spatial and temporal variability in brown trout abundance: a test of regression models. Rivers5, 1-12.
33.
Jowett, I. G.1998: Hydraulic geometry of New Zealand rivers and its use as a preliminary method of habitat assessment. Regulated Rivers14, 451-466.
34.
Jowett, I. G. and Biggs, B. J. F.1997: Flood and velocity effects on periphyton and silt accumulation in two New Zealand rivers. New Zealand Journal of Marine and Freshwater Research31, 287-300.
35.
Jowett, I. G. and Duncan, M. J.1990: Flow variability in New Zealand rivers and its relationship to in-stream habitat and biota. New Zealand Journal of Marine and Freshwater Research24, 305-317.
36.
Jowett, I. G. and Richardson, J.1989: Effects of a severe flood on instream habitat and trout populations in seven New Zealand rivers. New Zealand Journal of Marine and Freshwater Research23, 11-17.
37.
Jowett, I. G. and Richardson, J.1995: Habitat preferences of common, riverine New Zealand native fishes and implications for flow management. New Zealand Journal of Marine and Freshwater Research29, 13-23.
38.
Jowett, I. G., Richardson, J., Biggs, B. J. F., Hickey, C. W. and Quinn, J. M.1991: Microhabitat preferences of benthic invertebrates and the development of generalised Deleatidium spp. habitat suitability curves, applied to four New Zealand rivers. New Zealand Journal of Marine and Freshwater Research25, 187-199.
39.
Jowett, I. G., Richardson, J. and McDowell, R. M.1996: Relative effects of in-stream habitat and land use on fish distribution and abundance in tributaries of the Grey River, New Zealand. New Zealand Journal of Marine and Freshwater Research30, 463-475.
40.
Jowett, I. G., Rowe, D. and West, D.1996: Fishery flow requirements of the Tongariro River. NIWA client report ELE301 (unpublished). Hamilton: National Institute of Water and Atmospheric Research.
41.
Kingsland, S. and Collier, K.1998: WAIORA user guide. NIWA client report ARC70214/2 (unpublished). Hamilton: National Institute of Water and Atmospheric Research.
42.
Laronne, J. B. and Duncan, M. J.1992: Bedload transport paths and gravel bar formation. In Billi, P., Hey, R. D., Thorne, C. R. and Tacconi, P., editors, Dynamics of gravel-bed rivers, Chichester: Wiley, 177-202.
43.
Marutani, T., Kasai, M., Reid, L. M. and Trustrum, N. A. in press: Influence of storm-related sediment storage on the sediment delivery ratios of tributary catchments in the upper Waipaoa River, New Zealand. Earth Surface Processes and Landforms.
44.
McKerchar, A. I., Ibbitt, R. P., Brown, S. L. R. and Duncan, M. J.1998: Data for Ashley River to test channel network and river basin heterogeneity concepts. Water Resources Research34, 139-142.
45.
Ministry for the Environment1998: Flow guidelines for instream values (2 vols). Wellington: Ministry for the Environment.
46.
Mosley, M. P.1982: Analysis of the effect of changing discharge on channel morphology and instream uses in a braided river, Ohau River, New Zealand. Water Resources Research8, 800-812.
47.
Mosley, M. P.1983: Response of braided rivers to changing discharge. Journal of Hydrology (NZ)22, 18-67.
48.
Mosley, M. P.1992: River morphology. In Mosley, M. P., editor, Waters of New Zealand, Wellington: New Zealand Hydrological Society, 285-304.
49.
Mosley, M. P. and Duncan, M. J.1992: Rivers. In Selby, M. J. and Soons, J. M., editors, Landforms of New Zealand, Auckland: Longman Paul, 92-106.
50.
Mosley, M. P. and Jowett, I. G.1985: Fish habitat analysis using river flow simulation. New Zealand Journal of Marine and Freshwater Research19, 293-309.
51.
Nevins, T. H. F.1969: River training -the single thread channel. New Zealand Engineering15, 367-373.
52.
Nikora, V. I., Goring, D. G. and Biggs, B. J. F.1998: On gravel-bed roughness characterization. Water Resources Research34, 517-527.
53.
Ots, J. P. and Eldon, G. A.1975. Downstream movement of fry of Galaxias fasciatus Gray. New Zealand Journal of Marine and Freshwater Research9, 97-99.
54.
Page, M. J., Reid, L. M. and Lynn, I. H. in press: Sediment production from Cyclone Bola landslides, Waipaoa catchment. Journal of Hydrology (NZ).
55.
Page, M. J. and Trustrum, N. A.1997: A late Holocene lake sediment record of the erosion response to land use change in a steepland catchment, New Zealand. Zeitschrift für GeomorphologieNF 41, 369-392.
56.
Page, M. J., Trustrum, N. A. and Dymond, J. R.1994: Sediment budget to assess the geomorphic effect of a cyclonic storm, New Zealand. Geomorphology9, 169-188.
57.
Pickrill, R. A.1993: Sediment yields in Fiordland. Journal of Hydrology (NZ)31, 39-55.
58.
Quinn, J. M. and Hickey, C. W.1990: Magnitude of effects of substrate particle size, recent flooding, and catchment development on benthic invertebrates in 88 New Zealand rivers. New Zealand Journal of Marine and Freshwater Research24, 411-427.
59.
Rodriguez-Iturbe, I., Rinaldo, A., Rigon, R., Bras, R. L., Marani, A. and Ijjasz-Vasquez, E. J.1992: Energy dissipation, runoff production, and the three-dimensional structure of river basins. Water Resources Research28, 1095-1103.
60.
Rounick, J. S. and Winterbourn, M. J.1983: The formation, structure and utilization of stone surface organic layers in two New Zealand streams. Freshwater Biology13, 57-72.
61.
Scarsbrook, M.R. 1995: Disturbance and spatial refugia in stream communities. PhD thesis, University of Otago, Dunedin.
62.
Scott, D. and Shirvell, C. S.1987: A critique of the instream flow incremental methodology with observations on flow determination in New Zealand. In Kemper B. and Craig, J. F., editors, Regulated streams: advances in ecology, New York: Plenum Press, 27-43.
63.
Scrimgeour, G. J. and Winterbourn, M. J.1989: Effects of floods on epilithon and benthic macroinvertebrate populations in an unstable New Zealand river. Hydrobiologia171, 33-44.
64.
Thompson, S. M.1985: Transport of gravel by flows up to 500 m3/s, Ohau River, Otago, New Zealand. Journal of Hydraulic Research23, 285-303.
65.
Trustrum, N. A., Gomez, B., Page, M. J., Reid, L. M. and Hicks, D. M. in press: Sediment production, storage and output: the relative role of large magnitude events in steepland catchments. Zeitschrift für Geomorphologie Supplementband.
66.
Warburton, J., Davies, T. R. H., Griffiths, G. A., Hoey, T. B. and Young, W. J.1996: Future prospects for the use of hydraulic models in the management of New Zealand braided gravelbed rivers. Journal of Hydrology (NZ)35, 287-302.
67.
Warburton, J., Davies, T. R. H. and Mandl, M. G.1993: A meso-scale field investigation of channel change and floodplain characteristics in an upland braided gravel-bed river, New Zealand. In Best, J. L. and Bristow, C. S., editors, Braided rivers. Geological Society Special Publication 75, London: Geological Society, 241-255.
68.
Ward, J. and Pyle, E.1997: Environmental indicators for the sustainable management of freshwater. Report 2416/1. Lincoln, NZ: Lincoln Environmental, Lincoln University.
69.
Waters, B. F.1976: A methodology for evaluating the effects of different streamflows on salmonid habitat. In Orsborn, J. F. and Allman, C. H., editors, Instream flow needs. Volume 2, Bethesda, MD: American Fisheries Society, 254-266.
70.
Willgoose, G., Bras, R. L. and Rodriguez-Iturbe, I.1991: A coupled channel network growth and hillslope evolution model. 2. Nondimensionalization and applications. Water Resources Research27, 1685-1696.
