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Lake Rawa Pening comes from a spring that comes out of the swamp, besides that there are several rivers that empties into Rawa Pening, including: Galeh River, Torong River, Panjang River, Muncul River, Parat River, Legi River, Pitung River, Praginan River And the Rengas River. There are three problems that cause damage to the Rawa Pening Lake ecosystem, namely damage to the water catchment area, damage to the lake border, and water pollution. This study aims to analyze Dissolved Oxygen (DO) and Biological Oxygen Demand (BOD) spatially and temporally due to damage to the lake ecosystem. The method used is Inverse Distance Weighted (IDW), where 12 sample point locations were taken, there were 10 sample points representing each village (lake inlet and utilization) and 2 sample points representing the center and outlet of the lake. The average DO yield in September 2020 was 6.8 mg / L, then in October 2020 it was 4.65 mg / L and in November 2020 it was 3.04 mg / L. Then the average BOD in September 2020 was 3.16 mg / L, then in October 2020 it was 2.6 mg / L and in November it was 1.53 mg / L, so it can be seen that the DO variable and BOD both decreased from September to November 2020.

Walkable Campus is a pedestrian track design concept that prioritizes connectivity, accessibility, security, comfort, and beauty. The UKSW pedestrian track needs to be evaluated so that it can meet the needs of users. The evaluation was carried out using the walkable campus concept, so this study aims to produce a pedestrian path design based on a walkable campus. The research method used is descriptive statistics and Scenic Beauty Estimation (SBE). Descriptive statistics were used to evaluate connectivity, accessibility, security, and convenience. While SBE is used to evaluate beauty. There are 5 spots out of 3 zones where zone 1 has 2 spots, zone 2 has 1 spot, and zone 3 has 2 spots. The results of the descriptive statistical test show that the connectivity, accessibility, security, and comfort of the 3 zones received poor ratings from users. Therefore, the results of the evaluation of user perceptions are used to make a design proposal. The proposed design is made to meet the aspects of connectivity, accessibility, security, and convenience. Meanwhile, the results of the SBE evaluation show that the aesthetic condition of the existing pedestrian paths from 5 spots has a low SBE value when compared to the 3 proposed designs. In addition, the SBE evaluation is used to determine the design recommendations. There are 5 designs that meet the walkable campus concept.

Arboretum lanskap IPB merupakan sebuah greenbelt pada Jalan Raya Dramaga. Jalan Raya Dramaga merupakan jalur yang dipadati oleh kendaraan bermotor roda dua, roda empat, bahkan truk yang mengakibatkan tingginya polusi udara khususnya jenis partikel debu. Tujuan penelitian ini ialah untuk mengetahui kapasitas vegetasi sebagai green belt dalam menjerap debu. Metode penelitian yang digunakan ialah purposive sampling, dimana Pohon Nyamplung dan Pohon Spathodea digunakan sebagai sampel. Daun pada kedua jenis pohon tersebut akan diambil dan dianalisis untuk mendapatkan kapasitas jerapan debu. Hasil penelitian ini menjelaskan bahwa Pohon Spathodea memiliki kapasitas jerapan debu yang jauh lebih besar yaitu 0,041-0,043 g/m2 per hari, sementara Pohon Nyamplung memiliki kapasitas jerapan debu sebesar 0,023-0,025 g/m2 per hari.