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All Journal Asian Journal of Aquatic Sciences Jurnal Pendidikan Teknik Bangunan
Nugraha, Rafiq
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Education Engineering Transportation Other

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COMMUNITY STRUCTURE OF PHYTOPLANKTON AND CHLOROPHYLL-α CONCENTRATION IN THE SUNGAI MESJID VILLAGE DUMAI RIAU PROVINCE Nugraha, Rafiq; Nurrachmi, Irvina; Siregar, Sofyan
Asian Journal of Aquatic Sciences Vol. 4 No. 1 (2021): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

The research was conducted in December 2019 at Sungai Mesjid Village Dumai Riau Province. This study aims were to know the condition of water quality, know the structure of the phytoplankton community, know the concentration of chlorophyll-a and know the effect between chlorophyll-a concentration and phytoplankton abundance in waters. The method used in this study was a survey method. The research location is divided into 3 station points namely Bangsal Aceh, Marine Station and Jalan Dermaga. The results showed that the quality of waters classified as oligotrophic waters. Phytoplankton found in this study consisted of 4 classes and 12 species of phytoplankton and the abundance of phytoplankton has a range between 195.57 - 244.33 ind./l. Diversity index (H') ranges from 1.2951 - 2.1705, dominance index (D) ranges from 0.24 to 0.46 and uniformity index (E) ranges from 0.7825 to 0.9551. The chlorophyll-a concentration in waters of Sungai Mesjid Village in Dumai ranged from 0.0025 to 0.0210 mg/L. Phytoplankton abundance and chlorophyll-a concentration has a moderate effect, wherewith increasing chlorophyll-a concentration, phytoplankton abundance will also increase.
The Influence of Circulation Patterns on Visitor Crossing Patterns at Cihampelas Walk Bandung Sugiharti, Enok; Nawawi, Zidan; Nugraha, Rafiq
Jurnal Pendidikan Teknik Bangunan Vol 5, No 1 (2025): Jurnal Pendidikan Teknik Bangunan
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/jptb.v5i1.87065

Abstract

This research aims to analyze the relationship between the spatial circulation patterns at Cihampelas Walk Mall (Ciwalk) Bandung and the movement patterns as well as the distribution of visitors within the area. The main issue in this research is how the right circulation pattern can enhance comfort, movement efficiency, and the even distribution of visitors within the shopping center area. The research was conducted using a verifiable qualitative approach through descriptive-analytical and descriptive-comparative methods. Data were collected through direct observation, interviews with managers and visitors, field documentation, and literature review of theories related to spatial circulation. The objects of study include space configuration, circulation paths, and user interactions in the indoor and outdoor areas of Ciwalk. The research results show that the circulation design at Ciwalk is linear-dynamic, formed by the arrangement of building masses that respond to the irregular site shape and the application of the open mall concept. Linear patterns are commonly found in retail areas, while open areas such as plazas and gardens exhibit dynamic circulation patterns that support movement flexibility. The presence of the skywalk, central plaza, and pedestrian pathways surrounding the main building plays a crucial role in creating meeting points for visitors and naturally directing the flow of circulation. The separation of vehicle and pedestrian paths also enhances the comfort and safety of visitors. This study concludes that a well-designed circulation pattern can optimize spatial experience, enhance the area's attractiveness, and support the sustainability of visitor activities comprehensively
Co-Authors Irvina Nurachmi Nawawi, Zidan Siregar, Sofyan Sugiharti, Enok