by: susie everly dale brown riley jones investigating sediment accumulation over time and...

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???????