Piezometers

Introduction A. Piezometer (def): a non-pumping well that is used to measure the elevation of the water table or the potentiometric surface

Introduction A. Piezometer (def): a non-pumping well that is used to measure the elevation of the water table or the potentiometric surface

Introduction A. Def: a non-pumping well that is used to measure the elevation of the water table or the potentiometric surface B. Measures hydraulic head, or the total energy flowing through an aquifer.

II. Morphology A. The criteria 1. Consists of a tube or pipe 2. Must be sealed along its entire length

II. Morphology A. The criteria 1. Consists of a tube or pipe 2. Must be sealed along its entire length 3. Must be open to water flow at bottom and open to atmosphere at top

II. Morphology A. The criteria 1. Consists of a tube or pipe 2. Must be sealed along its entire length 3. Must be open to water flow at bottom and open to atmosphere at top 4. The intake is usually slotted or screened pipe

II. Morphology A. The criteria 1. Consists of a tube or pipe 2. Must be sealed along its entire length 3. Must be open to water flow at bottom and open to atmosphere at top 4. The intake is usually slotted or screened pipe B. Diagram

B. Diagram 6 1. Consists of a tube or pipe 2. Must be sealed along its entire length 3. Must be open to water flow at bottom and open to atmosphere at top 4. The intake is usually slotted or screened pipe 5 3 4 3 2 1

III. Installation

IV. Uses of Piezometers A. In general…. v, Q, K, dl, dh, S, Ss, T

IV. Uses of Piezometers A. In general…. B. Spaced Piezometers

IV. Uses of Piezometers A. In general…. B. Spaced Piezometers C. Nested Piezometers

IV. Uses of Piezometers A. In general…. B. Spaced Piezometers C. Nested Piezometers D. Equipotential and Flow Lines

D. Equipotential and Flow Lines

IV. Uses of Piezometers A. In general…. B. Spaced Piezometers C. Nested Piezometers D. Equipotential and Flow Lines E. Relationships among h, z, and Ψ

IV. Uses of Piezometers E. Relationships among h, z, and Ψ

IV. Uses of Piezometers E. Relationships among h, z, and Ψ

IV. Uses of Piezometers E. Relationships among h, z, and Ψ

V. Piezometer Response to Gaining and Losing Streams

Gaining and Losing Streams…..

VI. Examples

VII. 3-Point Problems

VII. 3-Point Problems

VI. Piezometer Response to Gaining and Losing Streams