specify the variation in the features of the plains as the river traverses downstream flowing through the plains till its confluence with the largest water bodies.
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Answers
Explanation:
Freshwater bodies
New Zealand’s fresh water bodies include glaciers, snow, rivers, streams, lakes, wetlands, springs and aquifers and groundwater.
Rivers
A ‘river’ is defined in the RMA as ‘a continually or intermittently flowing body of fresh water; and includes a stream and modified watercourse; but does not include any artificial watercourse (including an irrigation canal, water supply race, canal for the supply of water for electricity power generation or farm drainage canal)’.
New Zealand has 70 major river catchments, 40 in the South Island and 30 in the North Island, and over 425,000 kilometres of rivers and streams .
It is difficult to state with great accuracy the number and extent of smaller streams in New Zealand. Although some streams are permanent fixtures, others are intermittent (only flowing at certain times of the year) or ephemeral (only flowing for short periods of time following particular rain events) and their large number makes counting them an extremely challenging task.Because of New Zealand’s geography (being a narrow country with ridges of high mountains running along the centre and extensive hill country) and its high rainfall, rivers and streams are often relatively short, fast flowing and unstable. The large variety of rock types in New Zealand catchments means that there are many different types of rivers and they vary significantly.
A River Environment Classification system has been developed for New Zealand rivers. It is GIS-based and classifies rivers at a range of spatial scales on the basis of six hierarchical levels. Four are related to the catchment (climate, source of freshwater flow, geology and land cover) and two are focused on specific sections of the river (position of the section of the river within the catchment network and the landform of the valley in which the river section is located). The classification system has been applied to all rivers in New Zealand and is useful in informing the selection of appropriate management tools to manage pressures on particular types of rivers.
Variation in the features of the plains as the river traverses downstream flowing through the plains till its confluence with the largest water bodies
Explanation:
A 'river' is distinguished in the RMA as 'a continuous or intermittent body of fresh water and includes a stream and modified watercourse. But it does not include any artificial waterways (including irrigation canals, water supply runs, canals for water supply for electricity generation, or agricultural drainage canals).
It is difficult to state with great accuracy the number and extent of small streams in New Zealand. Although some streams are permanent fixtures, others are intermittent (flow only at certain times of the year) or short-lived (flow only for a short time after special rainfall events) and their large number makes them an extremely challenging task. Is.