Vetiver Network International Forum

This forum is for public viewing but registered users only to discuss and exchange information relating to Vetiver Grass and the Vetiver System.

You are not logged in.

Announcement

Welcome to the new (November 2018) Vetiver Network International Forum. Share your views and ideas, and help grow the Vetiver System in both size and quality to the benefit of its users and the Planet at large

#1 2019-02-28 06:03:22

Evan
Administrator

Landslip Site Rehab #2 in SE Queensland

FB link: https://www.facebook.com/groups/vetiver … 495482760/

This is a photo-log of a landslip remediation site in Maleny, Queensland. This document details why this area is prone to landslides and slips: http://www.barunglandcare.org.au/Resour … 0Sheet.pdf

This area is part of larger historical landslips that have the potential to increase turbidity into a creek that feeds into a water source for the township. The area is being planted with native trees for long-term control.


Here is the site pictured from afar. The work will be conducted on the left side and will be compared to standard tree planting on the right. There is a spring and under-road pipe that has caused the channeling through the middle. The water is pushing on this wall and keeping it moist in spots and dry in others. It's very lumpy with some basalt rocks throughout:

E3uNumQl.jpg

vSYbQrQl.jpg

XPHlBkyl.jpg

3C9C5gcl.jpg

Hslsk9Ul.jpg

cLntrF3l.jpg

vSYbQrQl.jpg


Work begins with trying to find contour benches throughout the lumps. There is no ability or manpower available to engineer the face of this wall so hedges are short and numerous:

ka3Q7ZEl.jpg

FieVdA9l.jpg

bINYDMsl.jpg

kSnCVxtl.jpg

FxxiStTl.jpg

6AMu0IYl.jpg


This planting day included an experiment to see if Vetiver could be planted directly into running water in silt alone (not an ideal thing to do on a landslip but it's sitting on bedrock and shouldn't be an issue):

whd0GvFl.jpg


A week later from above:

DULpMW0l.jpg


And further hedges:

Rd9QTU1l.jpg

KUbuhLCl.jpg

ZRTkbq9l.jpg

lRlPndXl.jpg


No photos were taken of another short session but here is the one after. Same deal, more hedges:

CKN2lINl.jpg

76oMELel.jpg

ly5DWLVl.jpg

DdG0JeRl.jpg


Shots of the entire site:

scY0oBPl.jpg

Rxn6A1El.jpg

mxKDW4sl.jpg


Higher resolution photos (SLR vs mobile phone) of the same area:

PaaVIdkl.jpg

dEJdU7Dl.jpg

mIiNWoRl.jpg

l48XKONl.jpg

0UxYluLl.jpg

ZWiB7mnl.jpg

fGuQSu7l.jpg

u71t2cgl.jpg

H85fmTDl.jpg

uWg0KkMl.jpg

Offline

#2 2019-02-28 06:03:34

Evan
Administrator

Re: Landslip Site Rehab #2 in SE Queensland

Photos taken today - 19/3/2019

200mm in 2 hours and 40mm afterwards resulted in water jumping the gully edge and dislodging approximately 30 Vetiver slips. The water channelled through the furrow and tore a large percentage of the absolute bottom row. 3 hedges had small sections pulled out. Replanting was done on Tuesday, storm was Friday and Monday.

sZue31Ll.jpg
ROVHvdal.jpg
Q3SdngNl.jpg
cBFbsuel.jpg
Lvs4jWRl.jpg
KVOUc6xl.jpg
VtqrPddl.jpg
wclRL6Jl.jpg
6hEfoUbl.jpg
o8g5tlZl.jpg
ONkJsBsl.jpg
XByy7Wsl.jpg
MmZQBP4l.jpg
iUFXQwxl.jpg
BdfAbKel.jpg
rK2cBYnl.jpg
BfFRueml.jpg
DnoDCQhl.jpg
lxD5vNdl.jpg
VQwKOtml.jpg
xSdQBXal.jpg
Mg7V7BSl.jpg

I had planted several plants in the wet drainage line/gully channel and they had the longest period of time establishing. Some managed to hang on but the damage was significant, not only to the plants but the channel was reconfigured and scoured.

One plant was pulled out by hand after being mostly dislodged and had this 50cm single root:

63ebzjDl.jpg

Offline

Board footer