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District. The population of Jayapura in 2008 is 256,705 person. Population density is 254 people km
2
Population growth is 14,28 . Jayapura City is also Capital of Papua Province BPS Jayapura City, 2011.
Regency of Jayapura has an area of 17.516 km
2
. Regency of Jayapura is located at 129
o
00‘16‖ – 141
o
01‘47‖ E dan 2
o
23‘10‖ N – 9
o
15‘00‖ S. Regency of Jayapura consists of 19 districts. The population of Jayapura Regency in 2011 is 111.943 person. Population
density is 7,05 people km
2
. Population growth is 10,69 BPS Jayapura Regency, 2011.
3.2 Characteristics Climate, Topography and Groundwater Basin
Preciptation around Buper Watershed is 1951 mmyear, with the average of rainy days is 148 daysyear. Maximum average of air temperature is 31,7°C and minimum
average of air temperature is 23.5°C. Average humidity is 82, average wind speed is 8,2 knot, and solar shines are 40,5 BMKG, 2011.
Buper watershed has a hilly topography with a height of 205 - 1300 MSL. Buper Watershed has an average slope in the upstream of 5 and an average slope in the
downstream areas of 20. In the downstream of the Buper Watershed there is a retention throughout the year.
Figure 3.2 Description of Buper Watershed Buper watershed is not included in the area of groundwater basin where there is no
potential for groundwater that can be utilized. Therefore the characteristics of the non- groundwater will greatly affect Buper Watershed especially in terms of water resources
availability DPU, 2010.
3.3 Landscape and Infrastructure
Until 2011, there is a government office in Buper Watershed located in the downstream area of 0.2 ha. On the Buper river there is a water intake for domestic use
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which is constructed by the government with the discharge of 50 liters sec PDAM Jayapura, 2008. Most of the Buper watershed land cover are forest and savannah. There
are nothing but both infrastructures, a goverment office and water intake.
Figure 3.3 Intake at Buper Watershed In the early stages of analysis, it is necessary to analyze previous reports. The
purpose of this analysis is to obtain information of study location, condition, and another important factors in the analysis of this study. Previous reports must have approximately
the same location with the studies proposed. There was an embung design project at Buper Watershed in 2009. In this Buper embung design project, the volume capacity of
embung design is 407,391 m
3
with water elevation at +210,50. In this design project, used dependable flow are dependable flow with 80
reliability. Average dependable flow of Q80 is 0,725 m3sec DPU Provinsi Papua , 2010. In order to design this embung, surface water measurement has been done in July
and November 2009. Buper watershed outflow as the result of the measurement are 624 ltsec in July and 654 ltsec in November 2009. Average of the measurement is 639 ltsec
DPU Jayapura, 2009.
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4 CHAPTER IV
METHODOLOGY
To achieve the objectives of this study, the appropriate methodology will be required. This methodology includes data collection, analysis used and the sequence of
processes performed. The methodology of the study can be represented in Figure 4.1 :
Figure 4.1 Flow Chart of Methodology
WATERSHED CONSERVATION
Topography Analysis
Land Use Change
Analysis Geological
Analysis
Water Demand Analysis
Water Availability
Analysis Land Use Suitability
Analysis
Soil Erosion Analysis
Water Balance Analysis
- Protect Water Resources
- Forest rehabilitation
- Land cultivation controlling in
the uplands -
Land Rehabilitation -
Develop sediment control and erosion control structure
-
- Store excess water in the rain
to be used in time of need. Water storage can be done
by developing rainwater storage, pool, embung
- Effective and efecient uses
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4.1 Data Collection
