by: susie everly dale brown riley jones investigating sediment accumulation over time and...
TRANSCRIPT
By:Susie EverlyDale BrownRiley Jones
Investigating Sediment Accumulation over Time and
Evaporative Water Loss of Carlson Pond: With Proposed Solutions
Overview Objectives
Materials and Methods
Results
Discussion
Implications
Questions
Objective To collect core samples to
determine amount of sediment accumulation and composition (water and organic content)
Determine the amount of evaporative loss experienced on Carlson’s Pond
MaterialsFor acquiring core samples
KB-core samplerGPSDepth finder Boat with all the necessary
supplies
For finding evaporation lossGPSWillingness to get muddy
Methods For Core Samples
Three different sites Took three subsamples at each siteAt each site took depth and GPS
point
Evaporative LossTook GPS points around the perimeter
This was done at high water and waters edge
Results
1 2 30
2
4
6
8
10
12
14
16
Sediment Depth
Site number
Sed
imen
t D
ep
th (
cm
)
20 30 40 50 60 70 80 900
2
4
6
8
10
12
14
16
18
20
Site 1Site 2Site 3
% Water Content
Sed
imen
t D
ep
th (
cm
)
2 4 6 8 10 12 14 16 180
2
4
6
8
10
12
14
16
18
20
Site 1 Site 2Site 3
% Organic Content
Sed
imen
t D
ep
th (
cm
)
Depth interval 2D Area 3D Area Volume
m^2
m^2
m^3
=+sed depth 1240.000 1272.376 865.606
0.000 1240.000 1271.618 825.033
-0.500 784.917 806.830 311.817
-1.000 250.183 256.574 70.413
-1.500 38.180 38.587 1.997
Full Pool 2319.952 2451.001 5566.839
Water Loss 1079.952 1179.383 4741.806
Sediment Volume 0.000 0.758 40.573
Discussion High water loss
Due to evaporation or leakage Further examination to pin point
source of water loss
Implications Add Trace-A-Leak dye To find source of water loss
If leakage is IdentifiedSolution is to add
Bentonite Clay
Application of Bentonite Clay Three Methods
Blanket methodMixed Blanket method Sprinkle method
If Done1-1.5 pounds per ft2
Carlson's pond would take 26,382-39,573 pounds minimum (Lesikar, 2003)
Bentonite Clay Effects Long Term Project
Seals off fish eggsPotentially kills zooplanktonInitially increases water turbidity
TreesEvergreens that are adapted to
dry areasPonderosa PinesLeyland CypressesCedars
ReferencesLesikar, B. J. (2003). Sealing Ponds and Lakes
with Bentonite. Available electronically from http://hdl. handle. net/1969, 1, 87264.
Questions???????