Stage One, Step One Stage One, Step Two Stage One, Step
43 CHAPTER FOUR STAGE ONE : BASELINE SURVEY OF RIVER CHARACTER AND BEHAVIOUR IN BEGA CATCHMENT 4.1 Introduction and outline of this chapter Stage One of the River Styles framework has three steps as noted in Figure 4.1. Figure 4.1 Steps in Stage One of the River Styles framework STAGE ONE, STEP ONE: Assess regional and catchment setting controls ⇓ STAGE ONE, STEP TWO: Define and map River Styles ⇓ STAGE ONE, STEP THREE: Interpret controls on the character, behaviour and downstream patterns of River Styles In this case study, the following products are presented in separate sections: Stage one, Step One • Regional setting, including landscape units, longitudinal profiles, geology, land use history, flood history etc., and measurement of catchment morphometric parameters. Stage One, Step Two • Catchment-specific River Styles tree. • Catchment-wide map showing the distribution of River Styles. • River Styles proformas, annotated cross sections and geomorphic unit maps and photographs for each River Style. Stage One, Step Three • Summary table of controls for all River Styles. • Longitudinal profile diagrams with associated plots that outline primary controls on each reach for a representative example of each downstream pattern of River Styles. 44 4.2 Stage One, Step One: Bega catchment regional setting 4.2.1 Catchment morphometry and geology Bega catchment is a relatively small coastal catchment located on the South Coast of New South Wales (NSW) (Figure 4.2; Table 4.1). The catchment comprises two hydrologically and geologically distinct river systems, the Brogo to the north, and the Bega-Bemboka to the south. The River Styles framework was applied to 16 subcatchments namely the Bemboka-Bega and Brogo trunk stream systems, Greendale, Frogs Hollow, South Wolumla, Wolumla, Towridgee, Candelo, Reedy, Tantawangalo, Sandy, Colombo, Pollacks Flat, House, Double and Numbugga tributary systems (Figure 4.3).
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