For a rainfall intensity of 4.69 cm/hr, a ponding time of 10 minutes was observed on a soil with 40% effective saturation. The wetting front soil suction head was measured at 16.7 cm. Aorý = 4.85 cm Identify the type of soil.
For a rainfall intensity of 4.69 cm/hr, a ponding time of 10 minutes was observed on a soil with 40% effective saturation. The wetting front soil suction head was measured at 16.7 cm. Aorý = 4.85 cm Identify the type of soil.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
choices: sandy loam, loamy sand, sandy clay loam, silt loam, none of the choices
![For a rainfall intensity of 4.69 cm/hr, a ponding time of 10 minutes was observed
on a soil with 40% effective saturation. The wetting front soil suction head was
measured at 16.7 cm. Aðp = 4.85 cm
Identify the type of soil.
Use the table below for reference.
TABLE 4.3.1
Green-Ampt infiltration parameters for various soil classes
Wetting front Hydraulie
soil suction
head
Soll class
Porosity
Effective
porosity
conductivity
K
(cm)
(cm/h)
0.437
(0.374-0.500)
0.437
0.417
(0.354–0.480)
0.401
Sand
4.95
11.78
(0.97–25.36)
6.13
(1.35-27.94)
11.01
Loamy sand
2.99
(0.363-0.506)
0.453
(0.329-0.473)
0.412
(0.283–0.541)
0.434
Sandy loam
1.09
(2.67-45.47)
8.89
(0.351-0.555)
0.463
(0.375-0.551)
0.501
(0.420-0.582)
0.398
Loam
0.34
(0.334-0.534)
0.486
(1.33-59.38)
16.68
Silt loam
0.65
(0.394-0.578)
0.330
(2.92-95.39)
21.85
(4.42–108.0)
20.88
Sandy clay
loam
0.15
(0.332-0.464)
0.464
(0.235-0.425)
0.309
Clay loam
0.10
(0.279-0.501)
0.432
(0.418-0.524) (0.347–0.517)
0.321
(0.370-0.490) (0.207–0.435)
0.423
(0.425-0.533) (0.334–0.512)
0.385
(0.409–0.519)
0.471
(4.79-91.10)
27.30
Silty clay
loam
Sandy clay
0.10
(5.67–131.50)
23.90
0.430
0.06
(4.08-140.2)
29.22
Silty clay
0.479
0.05
(6.13-139.4)
31.63
Clay
0.475
0.03
(0.427-0.523) (0.269–0.501)
(6.39–156.5)
The numbers in parentheses below each parameter are one standard deviation around the parameter
value given. Source: Rawls, Brakensiek, and Miller, 1983.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffd4ee9ea-149e-46ff-a6cf-bb19cc987a33%2Fef660d70-93f9-4d03-ad17-7041c4769d9d%2Fuf9w8zdh_processed.png&w=3840&q=75)
Transcribed Image Text:For a rainfall intensity of 4.69 cm/hr, a ponding time of 10 minutes was observed
on a soil with 40% effective saturation. The wetting front soil suction head was
measured at 16.7 cm. Aðp = 4.85 cm
Identify the type of soil.
Use the table below for reference.
TABLE 4.3.1
Green-Ampt infiltration parameters for various soil classes
Wetting front Hydraulie
soil suction
head
Soll class
Porosity
Effective
porosity
conductivity
K
(cm)
(cm/h)
0.437
(0.374-0.500)
0.437
0.417
(0.354–0.480)
0.401
Sand
4.95
11.78
(0.97–25.36)
6.13
(1.35-27.94)
11.01
Loamy sand
2.99
(0.363-0.506)
0.453
(0.329-0.473)
0.412
(0.283–0.541)
0.434
Sandy loam
1.09
(2.67-45.47)
8.89
(0.351-0.555)
0.463
(0.375-0.551)
0.501
(0.420-0.582)
0.398
Loam
0.34
(0.334-0.534)
0.486
(1.33-59.38)
16.68
Silt loam
0.65
(0.394-0.578)
0.330
(2.92-95.39)
21.85
(4.42–108.0)
20.88
Sandy clay
loam
0.15
(0.332-0.464)
0.464
(0.235-0.425)
0.309
Clay loam
0.10
(0.279-0.501)
0.432
(0.418-0.524) (0.347–0.517)
0.321
(0.370-0.490) (0.207–0.435)
0.423
(0.425-0.533) (0.334–0.512)
0.385
(0.409–0.519)
0.471
(4.79-91.10)
27.30
Silty clay
loam
Sandy clay
0.10
(5.67–131.50)
23.90
0.430
0.06
(4.08-140.2)
29.22
Silty clay
0.479
0.05
(6.13-139.4)
31.63
Clay
0.475
0.03
(0.427-0.523) (0.269–0.501)
(6.39–156.5)
The numbers in parentheses below each parameter are one standard deviation around the parameter
value given. Source: Rawls, Brakensiek, and Miller, 1983.
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