Horokiri Stream at Snodgrass
Daily maximum flow and suspended sediment concentration (SSC) for the 2018/19 monitoring season. SSC is predicted using a turbidity vs discrete SSC model that is updated annually, see last year’s report for more information. The flow event lines represent the flow level at which we would expect n years before another event that size.
Toggle between tabs to see sediment yields/loads of key events and annual totals.
Event Loads
| Event | Duration | Sediment load (t) | Sediment yield (t/ha) | Max flow (m3/s) | Flow return period (years) |
|---|---|---|---|---|---|
| 08-07-2018 - 10-07-2018 | 3 days, 17 hrs & 15 mins | 676 | 0.24 | 26.6 | 1 |
| 09-11-2018 - 10-11-2018 | 1 day, 17 hrs & 5 mins | 56 | 0.02 | 6.7 | <1 |
| 19-12-2018 - 20-12-2018 | 1 day, 15 hrs & 40 mins | 74 | 0.03 | 7.0 | <1 |
| 08-03-2019 - 08-03-2019 | 0 days, 6 hrs & 15 mins | 111 | 0.04 | 8.9 | 1 |
Annual Loads
| Year | Time | Sediment load (t) | Sediment yield (t/ha/yr) |
|---|---|---|---|
| 2012 | 47 days 12 hrs | 35 | 0.01 |
| 2013 | 365 days | 2,395 | 0.83 |
| 2014 | 365 days | 809 | 0.28 |
| 2015 | 365 days | 4,111 | 1.43 |
| 2016 | 366 days | 4,721 | 1.64 |
| 2017 | 365 days | 1,526 | 0.53 |
| 2018 | 365 days | 1,286 | 0.45 |
| 2019 | 180 days | 163 | 0.06 |
| Total | 2,419 days 12 hrs | 15,047 | 5.24 |
