DESIGN AND ESTIMATES OF RAINWATER HARVESTING SYSTEM OF

SPAMAST CAMPUSES

Ferdinand ZamoraBSAE

Dr. Irvin C. Generalao, Engr. Clara A. AcebesEngr. Eduardo F. Aquino and Ar. Jason B. Santos

Advisory Committee

THE PROBLEM AND ITS BACKGROUND

Fresh water

Rainwater Harvesting

Rainwater Harvesting system

Reduces Water bills

Objectives of the Study

1. To determine the water distribution of SPAMAST campuses.

2. To determine the water consumption of SPAMAST campuses.

3. To determine the rainfall characteristics of SPAMAST campuses.

4. To analyze the rainwater harvesting potentials of SPAMAST campuses.

5. To design of rainwater harvesting system.6. To estimate the cost of construction for rainwater

harvesting system in SPAMAST campuses.

Significance of Study

To provide option to have alternate source of water and to maximize the use of rainwater harvesting system.

Baseline information and guides for the future similar researches.

Scope and Limitation of the Study

Design and estimates of rainwater harvesting system in three SPAMAST campuses.

Base on the average monthly rainfall gathered from the campuses.

METHODOLOGY

The design and estimates of rainwater harvesting system of SPAMAST campuses (Malita campus, Buhangin campus and Digos campus) from November, 2014 to January 2015.

Research Locale

METHODOLOGY

Water distribution of SPAMAST campusesGathering of water consumption of SPAMAST

campusesGathering available rainfall data from

SPAMAST meteorological station.Analyzing rainwater harvesting potentialsDesign and estimates of rainwater harvesting

system

Gathering Procedure

RESULTS AND DISCUSSION

Water Distribution of SPAMAST Campuses

Figure 6. Water Distribution in SPAMAST- CAMFS, Poblacion, Malita, Davao Occidental.

Figure 7. Water Distribution in SPAMAST-Buhangin, Buhangin, Malita, Davao Occidental.

Figure 8. Water Distribution in SPAMAST-CAS, Matti, Digos City.

Water Consumption Data of SPAMAST Campuses

Figure 9.Graphical Illustration of Water Consumption of SPAMAST- CAS Campus.

Figure 10.Graphical Illustration of Water Consumption per cluster in 2013-2014, SPAMAST-Main Campus.

Rainfall Characteristics of SPAMAST Campuses

Janu

ary

Febru

ary

Mar

chApr

ilM

ayJu

ne July

Augus

t

Septe

mbe

r

Octob

er

Novem

ber

Decem

ber

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00A

vera

ge M

onth

ly R

ainf

all (

mm

)

Figure 11. Average Rainfall Data occurred in SPAMAST-CAS Campus (2014).

Jul.-1

0

Aug.-10

Sep.-10

Oct

.-10

Nov.

-10

Dec.

-10

Jan.-11

Feb.-11

Mar.

-11

Apr.

-11

May.

-11

Jun.-11

Jul.11

Aug.-11

Sep.-11

Oct

.-11

Nov.

-11

Dec.

-11

Jan.-12

Feb.-12

0

50

100

150

200

250

300

350

400

450

Tota

l Mon

thly

Rai

nfal

l (m

m)

Figure 12.Average Rainfall Data occurred in SPAMAST- Buhangin Campus (2010-2012).

No. Building Name Area (m²)

1 Gen.Ed Bldg.-Cas 8202 Gen.Ed Bldg.-Buhangin 14283 Dormitory-Buhangin 3204 GenEd Bldg.-Main 8205 Dormitory-Main 2006 Academic Bldg.-Main 3607 Education Bldg.-Main 7008 FMS Bldg.-Main 3609 Admin-Main 240

Rainwater Harvesting Potentials in SPAMAST Campuses

Table 6. Calculation of Rooftop Area of All Building

Design of Rainwater Harvesting System

Figure 16. Plumbing Layout of Rainwater Harvester in SPAMAST-CAS, Digos City.

Figure 17. Installation Plan of the Rainwater Harvester Collecting Pipes and Connection Details.

Figure 19. Tank Tower Details and Foundation Details.

No. Building NameRoof Top Area

(m²) Tank Capacity

Cost of Construction

(₱)

1 GenEd bldg. -CAS 410 6 m³

136,886.60

2 GenEd bldg.-Buhangin 714 8 m³

137,640.60

3 W.Dorm-Buhangin 160 3 m³

84,964.32

4 Acad. Bldg.-Malita 410 3 m³

84,964.32

5 Admin Bldg.-Malita 100 3 m³

79,406.04

6 FMS Bldg.-Malita 180 3 m³

86,421.10

7 Educ. Bldg.-Malita 350 4 m³

97,214.70

8 W.Dorm.-Malita 120 3 m³

80,279.64

9 GenEd Bldg.-Malita 410 6 m³

136,886.60

Total cost of Construction of Rainwater Harvesting System in Campuses 924,663.92

Table 7. Total Cost Estimates of Rainwater Harvesting System in SPAMAST Campuses.

SUMMARY, CONCLUSION AND RECOMMENDATION

• It was evaluated to determined the water distribution of SPAMAST

campuses, determine the water consumption ,to analyze the rainwater

harvesting potential of SPAMAST campuses, to design and estimates

the cost for construction of Rainwater harvesting system in campuses.

• The Highest water consumption data of SPAMAST-CAS was recorded

on July 2014, valuing 597.00 m³. The lowest measured data in was

35.00 m³ on March 2013

Summary

In SPAMAST-Malita, the highest consumption occurred from January 2013 to

October 2014 was the cluster-dormitory or meter no.960704557 valuing

368.00 m³ on September 2014 . Among the Four clusters, only the Model

house has almost no water consumed in 2013 and the largest value of water

consumed was 232.00 m³ in the month of October 2014.

nine potential rainwater harvesting can be utilized. The Dormitory, Academic

building, Administration building, FMS building, Education building and the

General education building in SPAMAST-Main Malita, one from SPAMAST-

CAS Digos where the General Education building. The women’s dormitory

and the General education building in Buhangin campus.

In designing rainwater harvesting system the utilization of water

is need to be considered in order to lessen the procurement of

water from the local water provider and the erosion of river banks

will be lessened.

The design is focused in flushing of comfort rooms and for the

irrigation purposes.

The total cost estimates for construction of rainwater harvesting

system in SPAMAST Campuses was 924,663.92 pesos.

The following conclusions were drawn:

the water that procured from water districts will be decreased with

the help of this technology.

Rainwater harvesting is seems to be a perfect replacement for

surface & ground water as later is concerned with the rising cost as

well as ecological problems.

It was finally concluded that implementation of RAINWATER

HARVESTING PROJECT to the campuses of SPAMAST.

Conclusion

There is a need to conduct seminar and training on the current

issues on water problems and purchasing, and introduced the

benefits of rainwater harvesting system in the community.

There should be monthly data of consumption of water that are

pump underground in every campus.

There should be maintenance in water distribution lines in

SPAMAST campuses.

Recommendation

Therefore, water is highly a precious natural resource which is

always in high demand today and thus, RAINWATER

HARVESTING AT SPAMAST campuses is highly recommended.