SEBARAN KUALITAS AIR LAUT DI PERAIRAN SEKITAR PLTU TELUK SEPANG KOTA BENGKULU BERDASARKAN PARAMETER FISIKA-KIMIA

PLTU Teluk Sepang Bengkulu City produces heat waste dumped back into the sea which affects the quality of the water so that it has a negative impact on marine life. This study aimed to identify the quality of the water around PLTU Teluk Sepang Bengkulu City based on the physical and chemical parameters. The method used was direct measurement at the research location which is carried out at 12 measurement points,i.e 4 points around the outlet area, and 8 points in the off-shore area. The measurement result was compared with seawater quality standard for marine biota based on the Minister of Environment Decree No. 51 of 2004 and was validated by analysis of sea water quality before the PLTU had operated. The result showed that the some parameters met the quality standards for marine biota included DO of 5.62-7.82, pH and turbidity in the offshore area with each value of 7.24-7.86 and 1.68-4.846 NTU. Meanwhile, the parameters which did not meet quality standards include a temperature of 30.62-36 ºC, a salinity of 26.6-30 ‰,  pH and turbidity around the outlet area with each value of  6.7-6.88 and 23.25-146.8 NTU. Based on the validation result, it showed that heat waste had a very significant effect on the physical and chemical parameters of the waters, especially on temperature, pH, and turbidity

Kajian Kualitas Air dan Indeks Pencemaran Di Perairan Kampung Sejahtera Pulau Baai Kota Bengkulu

Water quality is one of the important factors supporting the growth of mangrove ecosystems. The activites of Kampung Sejahtera’s people were allegedly polluted the waters and disturbing the mangrove ecosystem. This study aimed  to identify  the status of water quality and pollution index in the waters of Kampung Sejahtera, Bengkulu City. The method used is a direct measurement at the research location which was carried out at 9 location points, 5 points representing the waters near the settlements of the prosperous village residents, and 4 location points representing the waters near the mangrove ecosystem. Then the results are compared with the Decree of the State Minister of the Environment No. 51 of 2004 concerning seawater quality standards for marine biota and to determine the status of water quality by using the pollution index method based on the Decree of the State Minister of the Environment No. 115 of 2003. The results of this study indicate that the temperature parameter, salinity, and pH met the quality standard while the TSS and DO parameters did not fulfill the quality standard. Based on the results of the calculation of the pollution index that the waters of Kampung Sejahtera are in the category of good condition to lightly pollute

Struktur Bawah Permukaan pada Lokasi Rencana Pembangunan Rumah Sakit Muhammadiyah Kota Bengkulu dengan Metode seismik MASW Secara 2 Dimensi

A study on the subsurface structure has been conducted using the multichannel analysis of surface wave (MASW) method near Tugu Hiu, Bengkulu City, the location where Muhammadiyah hospital will be built. We aimed to determine the subsurface structure in 2-Dimension (2D) to classify soil type on the location. The data were measured with seismograph PASI 16S24-P using 24 geophones for a track of 72 m of total length and 1.5 m of intervals. The seismic data were processed by using seismic ParkSeis software. The results show that shear wave velocity (Vs) is 800-1200 m/s at a depth of 1-5 m, indicating this layer is filled by rock type (unsaturated). At a depth of 6-8 m below surface, Vs value decreases to 400-500 m/s which may indicate that the soft rock type fills the layer. The results of this study provide a high level of confidence, about 80-100%, in the Vs value. Thus, we suggest for the foundation of hospital construction, the pillars for construction must be for more than 10 m in depth with a solid concrete foundation. This to ensure the foundation can withstand the building in case of shake during an earthquake