Waterwatch Data Portal
ME_YDI833 Nerreman Wetland @ Eltham
22 January 2017
Overview
| Catchment | Yarra River |
|---|---|
| Site | Nerreman Wetland @ Eltham ME_YDI833 |
| Date and Time | Sunday 22nd January 2017 10:30am |
| Approved | Approved |
Physical Chemical Tests
| Ammon-Nit mg/L NH3-N | N mg/L NH4+ | D.O mg/L | EC µS/cm | FrP mg/L P | Nitrate-Nit mg/L N | pH pH Units | rP mg/L P | Air ° C | Water ° C | Turb NTU | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sample | 4 | 27 | 18.5 | 30 |
| Weather | sunny |
|---|---|
| Last rainfall | During the last week 31.60 |
| Flow estimate | LOW: Minimum flow in channel/continuous flow in some part of channel (in-stream habitats connected) |
| Water Appearance | Smelly,Other |
| Stream depth | 0 - 50cm |
| Stream width | 2m - 5m |
| Hazards | |
| Litter/Pollutants | bottles,paper,plastic,cans,packets,polystyrene,other: balls |
Changes after heavy downpours 29/30th Dec.(66mm) 19/20thJan.(16mm) :
The large tree trunk downstream from the site has become a dam.
The creek bed has become undermined so that the water depth is now 40cm (previously 18cm) however, the width is almost the same as last time.
Growth of Cumbungi has doubled, with many plants uprooted.
Montbretia weed is in flower and is spreading all along the creek.
Lots of extra rubbish on the dam ledge below the dam wall.
Surprisingly, there is no rubbish in the pit drain.
Lythrum salicaria is very showy in the small, planted wetland.
Excessive growth of creekside weeds --- Buffalo Grass Buttercup Tradescantia ------------------------------------------- BIRDS: Bronzewings Kookaburras Mudlarks Magpies Noisy Miners One Pacific Black Duck with 5 ducklings.
Long-necked Turtle below the dam wall. Dragonflies and Damselflies in flight. Marsh Frog calling. Cicadas calling. Lots of Midges in flight.
Creatures Agreed Level Taxonomy Method
| Image | Species | Score | Quantity |
|---|---|---|---|
|
c. Phylum Annelida, class Hirudinea, (leeches) | 1 | 3 |
| d. Phylum Annelida, class Oligochaeta, (worms) | 1 | 20 | |
| e. Family Chironomidae, several genera (blood worms) | 1 | 100 | |
| e. Family Lestidae and Family Coenagrionidae (Damselfly nymph) | 2 | 40 | |
| f. Corduliid / libellulid like dragonflies - various families (spider mud eye) | 5 | 2 | |
| g. Family Physidae, Species Physa acuta (snail) | 1 | 2 | |
| h. Family Notonectidae , Genus Enithares (robust backswimmers) | 1 | 3 | |
| i. Family Dytiscidae, (two-tailed tigers) | 2 | 1 | |
| j. Family Dytiscidae, (nosey tigers) | 2 | 1 | |
| m. Family Syrphidae (rat tailed maggot) | 1 | 1 | |
| ALT Signal Score | 2.80 | ||
| Weighted ALT Signal Score | 2.52 | ||
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