Characterizing Soil Based on Chemical and Physical Properties - - PowerPoint PPT Presentation

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Characterizing Soil Based on Chemical and Physical Properties - - PowerPoint PPT Presentation

Oct 03, 2023 8 likes •179 views

Characterizing Soil Based on Chemical and Physical Properties Intern: Ranulfo Morales Major: Mechanical Engineer- UCSB Mentor: Kristin Clark Faculty Advisor: Dr. Arturo Keller Project Funded By: L.A Regional Water Quality Board and Friends of the

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SLIDE 1

Characterizing Soil Based on Chemical and Physical Properties

Intern: Ranulfo Morales Major: Mechanical Engineer-UCSB Mentor: Kristin Clark Faculty Advisor: Dr. Arturo Keller

Project Funded By: L.A Regional Water Quality Board and Friends of the Santa Clara River

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SLIDE 2

Background Background

  • Water quality improvement

Water quality improvement in the Santa Clara River. in the Santa Clara River.

  • Decrease pesticides and

Decrease pesticides and nutrients daily loads from nutrients daily loads from agriculture runoff into the agriculture runoff into the Santa Clara River. Santa Clara River.

  • Use bioswales and bioactive

Use bioswales and bioactive trenches to decontaminate trenches to decontaminate water as a low cost water as a low cost alternative. alternative.

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SLIDE 3

Biotrenches and Bioswales Biotrenches and Bioswales

Flowmeter G W well Timer control valve Fertigater w/timer control valve

Biotrenches Bioswales

145 ft 3 ft 165 ft

Not to scale

14 ft

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SLIDE 4

My Contribution My Contribution

  • Understand a way to study the transport of

Understand a way to study the transport of nutrients and pesticides in the swales and trenches. nutrients and pesticides in the swales and trenches.

  • Transport processes:

Transport processes:

  • Adsorption

Adsorption

  • Advection

Advection-

  • dispersion

dispersion

  • Characterize the physical properties of soils:

Characterize the physical properties of soils:

  • Bulk density

Bulk density

  • Moisture content

Moisture content

  • Specific gravity

Specific gravity

  • Particle size

Particle size

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SLIDE 5

Overview Overview

Preliminary Analysis Preliminary Analysis

  • Collect soil samples

Collect soil samples

  • Process using ASTM methods

Process using ASTM methods Methods Methods

  • Measure Specific Gravity, Soil Moisture, Hygroscopic

Measure Specific Gravity, Soil Moisture, Hygroscopic Moisture, Bulk density, % soil suspension Moisture, Bulk density, % soil suspension Analysis Analysis

  • Calculate particle size and texture

Calculate particle size and texture

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SLIDE 6

Process Process

  • 1. Take soil samples

from Bioswales

  • 2. Label and separate

samples in plate for air drying.

  • 3. Sieve in 2mm pan
  • 4. Put other half of

samples in Al. pan to oven dry

1 2 3 4

I2 I1 I3 I4 I5 M1 M2 M3 M4 M5 O1 O2 O3 O4 O5

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SLIDE 7

Methods Methods

Measure Bulk Density Measure moisture content using the oven dried method Measure specific gravity of the soil relative to water

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SLIDE 8

Methods and Apparatus Methods and Apparatus

Soil Samples Hydrometer Plunger Data Book

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SLIDE 9

Data Data

Bulk Density (g/mL)

0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 I n p u t 1 I n p u t 2 I n p u t 3 I n p u t 4 I n p u t 5 O u t p u t 1 O u t p u t 2 O u t p u t 3 O u t p u t 4 O u t p u t 5 M i d d l e 1 M i d d l e 2 M i d d l e 3 M i d d l e 4 M i d d l e 5

Sample Bulk Density (g/mL)

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SLIDE 10

Data

Moisture Content

5 10 15 20 25 30 35 40

% Moisture

Input Sample Output Sample Middle Sample

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SLIDE 11

Data Data

Specific Gravity

0.5 1 1.5 2 2.5 3 3.5 G_s Sample

Specific Gravity

Input 1 Input 2 Input 3 Input 4 Input 5 Output 1 Output 2 Output 3 Output 4 Output 5 Middle 1 Middle 2 Middle 3 Middle 4 Middle 5

G_s = (K*M_s )/(M_s +M_pw @T_x – Mpws)

Output Samples Middle Samples Input Samples

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SLIDE 12

Results Results

100-28=72%

Output 3 Sample (g) 4 hrs

7

2 min 4 hrs time

% Suspension

Courtesy: USDA-Soil Texture

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SLIDE 13

What We Learned What We Learned

* How to use the Hydrometer * Classify soil texture using USDA Soil Texture Triangle * Analyze the particle size of the different samples

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Future Work Future Work

* Characterize chemical properties:

  • Soil organic matter (SOM)
  • Dissolved organic matter (DOM)
  • Cation-exchange capacity (CEC)
  • Residual pesticides

* Model lateral and vertical transport of ground water

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SLIDE 15

Acknowledgments Acknowledgments

Kristin Clark

  • Dr. Arturo Keller

Peng Wang Samantha Freeman

  • Dr. Nick Arnold

Liu-Yen Kramer Luke Bawazer

  • Dr. Evelyn Hu

Group B

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SLIDE 16

QUESTIONS!!!

http://maxweber.hunter.cuny.edu/pub/eres/EDSPC715_MCINTYRE/MonstersCartoon

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SLIDE 17

Biotrenches and Bioswales Biotrenches and Bioswales

2.5 m Compost and mulch Add “HRC” as needed

aquitard

3 m 3 m 3 m Compost and mulch Add “ORC” as needed

GW flow

Sampling well

2.5 m Compost and mulch Add “HRC” as needed

aquitard

3 m 3 m 3 m Compost and mulch Add “ORC” as needed

GW flow

Sampling well