Factors Of Flooding Best Docx.docx

FACTORS OF FLOODING Ill-aligned drains, poor/uncoordinated storm drains

UPPER MIDDLE

LOWER

630

86

112

440

93

107

295

64

79

178

32

99

91

5

7

141

19

34

199

27

53

(A) High intensity rainstorms, prolong rain events (B) Poor waste management (C) Relief/Topography (D) Concrete road median, paved surface, low or zero soil infiltration (E) Poor flood risk assessment, monitory and management (F) Unplanned urbanization, dense roofed development/increased in paved surfaces (G)

METHODOLOGY

This required that three different types of questionnaires were administered, namely; household questionnaire, community group template (used during the FGDs), and biophysical assessment template. Feedbacks were obtained from the enumerators on their field experiences were used to improve the data collection process until the completion of the field exercise. A minimum of two follow-up outings was arranged at the household and community levels to ensure no important data were left out. Although a biophysical study template was used, most biophysical data were obtained from primary data gathering techniques, instrument-aided assessments and measurements, modeling and incorporation of proof-checked existing reports. Multiple sampling techniques were used to confirm or clear gray areas in the biophysical assessments.

Measures were taken through retooling and review to develop statistically-useful sampling frames for the surveys both at community and household levels in order to achieve the objectives outlined in Components 1–4 (Section 1.3). The field survey plan ensured the hiring and training of interviewers to carry out the survey in the project areas with a clear understanding of watershed configurations. A choice was made on the use of the SPSS statistical package because of its wide data management scope.

EFFECT OF FLOODING

UPPER

MIDDLE

LOWER

Inundation of farmlands

289

16

15

251

6

5

126

12

12

(H) Prolonged travel time (I) Destruction of road and public facilities

(J) Settlement relocation

216

41

116

214

39

90

105

18

41

143

32

72

295

96

92

(K) Outbreak of water borne diseases (L) Pollution of water sources (M) Loss of household properties (N) Loss of income(O)

Pair wise Correlation matrix of factor of flooding and effect of flooding in IBB flood catchment area A

B

C

D

E

A

1.000

B

1.000

1.000

C

1.000

1.000

1.000

D

.907

.905

.914

1.000

E

1.000

1.000

.999

.898

1.000

F

.998

.997

.998

.935

.996

F

1.000

G

H

I

J

K

L

M

N

O

G

.995

.994

.997

.944

.993

1.000

1.000

H

.999

.999

.998

.887

1.000

.993

.990

1.000

1

.999

.999

.998

.887

1.000

.993

.990

1.000

1.000

J

.999

.999

.998

.889

1.000

.994

.990

1.000

1.000

1.000

K

.921

.919

.927

.999

.913

.947

.955

.903

.903

.904

1.000

L

.970

.969

.974

.982

.965

.985

.989

.958

.958

.959

.988

1.000

M

.977

.975

.980

.976

.972

.990

.993

.966

.966

.967

.983

1.000

1.000

N

.949

.947

.954

.994

.942

.969

.975

.933

.933

.935

.997

.997

.994

1.000

O

.998

.999

.997

.881

.999

.992

.988

1.000

1.000

1.000

.897

.954

.962

.928

Rotated Component Matrixa FACTORS

VARIABLES 1

2

Ill-aligned drains, poor/uncoordinated storm

.817

.576

.821

.571

Poor waste management

.808

.589

Relief /Topography

.499

.867

drains High intensity rainstorms, prolong rain events

1.000

Concrete road median, paved surface, low or zero

.830

.558

.774

.633

.757

.654

inundation of farmlands

.843

.539

prolonged travel time

.843

.538

.841

.541

.529

.849

.653

.757

.675

.738

.593

.805

.850

.527

soil infiltration Poor flood risk assessment, monitory and management Unplanned urbanization, dense roofed development/increased in paved surfaces

destruction of public facilities settlement relocation outbreak of water borne diseases pollution of water sources destruction of household properties loss of income

Total variance explained Factor

Eigen value

Percentage

of Cumulative

variance explained

%age explained

1

14.592

97.280

97.280

11

0.408

2.720

100

Total

15.0

100

100