Download 19 Terry Hume - Appendix B

Statement of Evidence in Chief of Terry Hume on behalf of Trans-Tasman
Resources Ltd
Figures
Figure 1. Study area and beaches surveyed (yellow dots).
Figure 2. Outlines of the 8 hypothetical bathymetry changes tested. The bathymetry cases number
from the top left panel (Case 01) to bottom left (Case 04) to bottom right panel (Case 08).
Figure 3. Beach formed in a coastal re-entrant at Waverley. The yellow triangles show where the
beach profiles were surveyed each month.
Figure 4. Mixed sand and gravel beach at the base of the seacliffs at Hawera
Figure 5. Sand dunes at Waiinu Beach.
Figure 6. Pits dug in the beach at Manawapou show alternating layers of coarse and fine sediments
(ruler scale in centimetres).
Figure 7a. Spaghetti plot of 11 profile surveys at Ototoka. The elevation is in metres above Taranaki
Mean Sea Level datum.
Figure 7b. Spaghetti plot of 11 profile surveys at Patea. The elevation is in metres above Taranaki
Mean Sea Level datum.
Figure 8. Time-averaged near-bottom mean velocity from the inner model. Velocity vectors are
averaged over 730 days and shown at every third grid point. The depth contours are at 10, 25, 50,
75, 100 m. The sand extraction project area is shown as the black polygon and the 22.2 km
territorial limit with the thin black line. (Source Hadfield 2013).
Figure 9. Wave parameters at the 10 m isobath with existing (baseline) bathymetry, in all 6
environmental scenarios. From top to bottom: significant wave height, mean wave direction, mean
wave period, and root-mean-square bed orbital velocity. Locations of the beaches surveyed are
shown above the 2nd panel. Place names on the 2nd panel map are beaches where profiling was
undertaken.
Figure 10. Difference between wave parameters at the 10 m isobath for case 1 and existing
bathymetry, in all 6 environmental scenarios. From top to bottom: significant wave height, mean
wave direction, mean wave period and root-mean-square bed orbital velocity are plotted as a
function of distance along the 10 m isobath. Locations of the beaches surveyed are shown above the
2nd panel.
Figure 11 Difference between wave parameters at the 10 m isobath for case 3 and existing
bathymetry, in all 6 environmental scenarios. From top to bottom: significant wave height, mean
wave direction, mean wave period, and root-mean-square bed orbital velocity.
Figure 12. Maximum (over six environmental scenarios) of the absolute change in wave parameters
at the 10m isobath. Values are plotted for all bathymetry cases, as a function of distance along the
10 m isobath.
Figure 13. Mean (over six environmental scenarios) of the absolute change in wave parameters (in
metres) at the 10m isobath. Values are plotted for all bathymetry cases, as a function of distance
along the 10 m isobath.
Figure 14. Maximum (over six environmental scenarios) of the relative change in wave parameters
(as a fraction of the baseline values) at the 10m isobath. Values are plotted for all bathymetry cases,
as a function of distance along the 10 m isobath.
Figure 15. Mean (over six environmental scenarios) of the relative change in wave parameters (as a
fraction of the baseline values) at the 10m isobath. Values are plotted for all bathymetry cases, as a
function of distance along the 10 m isobath.
Figure 16. Mean values and standard deviation of wave statistics at the 10 m isobath, from the
baseline long-term simulation. Mean values (over a 12 month period) from the baseline simulation
are shown by solid black lines, plus and minus one standard deviation (dashed lines). Statistics
shown are, from the top, significant wave height, mean wave direction, second-moment mean wave
period and root-mean square bed orbital velocity.
Figure 17. Mean difference (bias) and standard deviation of the difference between the case 1 and
baseline long-term simulations of wave statistics at the 10 m isobath. Statistics shown are, from the
top, significant wave height, mean wave direction, second-moment mean wave period and rootmean square bed orbital velocity. The dashed lines show one standard deviation either side of the
mean (solid red lines).
Figure 18. Root-mean-square difference in wave statistics at the 10 m isobath, between the case 1
and baseline long-term simulations. Statistics shown are, from the top, significant wave height,
mean wave direction, second-moment mean wave period and root-mean square bed orbital
velocity.
Figure 19. Mean fractional difference in values of wave statistics at the 10 m isobath, between the
case 1 and baseline long-term simulations. Statistics shown are, from the top, significant wave
height, second-moment mean wave period and root-mean square bed orbital velocity.
Figure 20. Net onshore flux factor Pos at the coast. The mean value (over a 12 month period) from
the baseline simulation is shown by the colour-scaled ribbon in the bottom panel, and as a solid
black line in the panel above, compared with the mean value from the case 1 simulation (red), and
the standard deviation (SDh) from the baseline simulation (dashed black line). In the two panels
above that, the mean difference (bias = case 1 - baseline) between the two simulations is shown,
plotted on its own and also plotted along with green dashed lines showing plus and minus half the
baseline standard deviation (SDm). The top two panels show the root-mean-square difference
(RMSD) between the two simulations, in absolute value (kW/m) and as a fraction of the baseline
standard deviation (SDm) (red line) and mean magnitude (dashed green line).
Figure 21. Net longshore flux factor Pls (black scales) and sediment transport potential Q (gold
scales) at the coast. The mean value (over a 12 month period) from the baseline simulation is shown
by the colour-scaled ribbon in the bottom panel, and as a solid black line in the panel above,
compared with the mean value from the case 1 simulation (red), and the standard deviation (SDh)
from the baseline simulation (dashed black line). In the two panels above that, the mean difference
(bias = case 1 - baseline) between the two simulations is shown, plotted on its own and also plotted
along with green dashed lines showing plus and minus half the baseline standard deviation (SDh).
The top two panels show the root-mean-square difference (RMSD) between the two simulations, in
absolute value and as a fraction of the baseline standard deviation (SDm) (red line) and mean
magnitude (dashed green line) of total Pls.
Figure 22. Magnitude of the longshore wave energy flux factor Pls (black scales) and sediment
transport potential Q (gold scales). The mean value (over a 12 month period) from the baseline
simulation is shown by the colour-scaled ribbon in the bottom panel, and as a solid black line in the
panel above, compared with the mean value from the case 5 simulation (red), and the standard
deviation (SDh) from the baseline simulation (dashed black line). In the two panels above that, the
mean difference (bias = case 1 - baseline) between the two simulations is shown, plotted on its own
and also plotted along with green dashed lines showing plus and minus half the baseline standard
deviation (SDm) of total Pls (or Q).
Figure 23. Magnitude of the longshore wave energy flux factor Pls (black scales) and sediment
transport potential Q (gold scales), averaged over times when they have positive values. The mean
value (over a 12 month period) from the baseline simulation is shown by the colour-scaled ribbon in
the bottom panel, and as a solid black line in the panel above, compared with the mean value from
the case 1 simulation (red), and the standard deviation (SDh) from the baseline simulation (dashed
black line). In the two panels above that, the mean difference (bias = case 1 - baseline) between the
two simulations is shown, plotted on its own and also (top plot) plotted along with green dashed
lines showing plus and minus half the baseline standard deviation (SDm) of total Pls (or Q).
Figure 24. Magnitude of the longshore wave energy flux factor Pls (black scales) and sediment
transport potential Q (gold scales), averaged over times when they have negative values. The mean
value (over a 12 month period) from the baseline simulation is shown by the colour-scaled ribbon in
the bottom panel, and as a solid black line in the panel above, compared with the mean value from
the case 1 simulation (red), and the standard deviation (SDh) from the baseline simulation (dashed
black line). In the two panels above that, the mean difference (bias = case 1 - baseline) between the
two simulations is shown, plotted on its own and also plotted along with green dashed lines showing
plus and minus half the baseline standard deviation (SDm) of total Pls (or Q).