Nizar Nasrullah

PENGARUH TATA HIJAU TERHADAP SUHU DAN KELEMBABAN RELATIF UDARA, PADA BALAI BESAR PENGEMBANGAN MEKANISASI PERTANIAN, SERPONG

Green Open Space on office area essential to be considered to create a comfortable environment. Greenery in BBP MEKTAN need to be improved to increase the climatological comfort, beside built area around. The Study aimed to asses the effect of canopy shape, distance from tree, and tree distance from building. This study also asses the relation between temperature and RH of green open space, and planning for BPP MEKTAN greenery for climatological comfort. The observation was conducted in the area of BBP MEKTAN. The observation was conducted from February to May 2013 in BPP MEKTAN. The Analysis of temperature and humidity was performed by varian analysis and middle value test. The result of this study showed that the shape of canopy affect the temperature and humidity, the crown around and round open decrease the average temperature about 2C and increase humidityabout 5%.he farther the distance from the tree, then the effect of a decrease in temperature and increase in humidity are decreasing. The closer the trees from the buildings and the wider canopy cover, result on a decreasing in temperature and an increasing in RH indoor Cover area of open green space associated with the temperature and humidity, the total area of open green space relationship with temperature. Planning of green open space in BBP MEKTAN was based on the results of previous study 1 and 2, that is conducted by addition of vegetation that provides shade effect in areas close to buildings, roads, and parking areas.

Study of the effectiveness of several tree canopy types on roadside green belt in influencing the distribution of NO2 gas emitted from transportation

Transportation is one significant factor which contributes to urban air pollution. One of the pollutants emitted from transportation which affect humans health is NO2. Plants, especially trees, have high potential in reducing air pollutants from transportation through diffusion, absorbtion, adsorption and deposition. Purpose of this study was to analyze the effectiveness of several tree canopy types on roadside green belt in influencing distribution of NO2 gas emitted from transportation. The study conducted in three plots of tree canopy in Jagorawi Highway: Bungur (Lagerstroemia speciosa), Gmelina (Gmelina arborea) and Tanjung (Mimusops elengi). The tree canopy ability in absorbing pollutant is derived by comparing air quality on vegetated area with ambience air quality at control area (open field). Air sampling was conducted to measure NO2 concentration at elevation 1.5m, 5m and 10m at distance 0m, 10m and 30m, using Air Sampler Impinger. Concentration of NO2 was analyzed with Griess-Saltzman method. From this research, the result of ANOVA showed that tree plot (vegetated area) affected significantly to NO2 concentration. However the effect of distance from road and elevation was not significant. Among the plots, the highest NO2 concentration was found on Control plot (area without tree canopy), while the lowest NO2 concentration was found in Tanjung plot. Tanjung plot with round shape and high density canopy performed better in reducing NO2 than Bungur plot with round shape and medium density canopy, regardless the sampling elevation and distance. Gmelina plot performed the best in reducing horizontal distribution of NO2 concentration at elevation 1.5 and 5m, but the result at elevation 10m was not significant.

Study of the Effectivity of Several Tree Canopy Types on Roadside Green Belt in Influencing The Distribution Vertically and Horizontally of CO gas Emitted from Transportation Activities to Vicinity of The Road

High volume of vehicle leads to the increase of emission of pollutants level in major cities of Indonesia. Carbon monoxide (CO) is categorized as the main gas pollutants from transportation that are harmful to human health. Plants could be used as roadside green belt to reduce the level of pollutants emitted from the transportation. The purpose of this research is to determine tree canopy type that effectively reduce CO gas concentration, to determine the relation between tree canopy types and pollutant distribution vertically and horizontally. The research was conducted on roadside green belt of Jagorawi Highway, especially on the plot of glodogan (Polyanthea fragrans), plot of mahogany (Swietenia macrophylla) and a control plot (open filed). Air sampling was conducted to measure the concentration of CO at three elevation 1.5 m, 5 m, and 10 m at each distance 0 m, 10 m, and 30 m. Concentration of CO was analysed using Iodometri method. Vertical distribution of CO gas shows that the concentration increases with the increasing of sampling elevation on the plot of Polyalthia fragrans and Swietenia mahogany, but the control plot shows the opposite. Horizontal distribution shows that the concentration decreases at the distance 10 m on the plot of Polyalthia fragrans and Swietenia mahogany, but the concentration increases again at the distance 30 m. At the distance 10 m and an elevation 1.5 m, the highest decline percentage of CO occurs on the plot of Swietenia mahogany (45.1%), on the plot of Polyalthia fragrans is just 22.2%, while in control plot, it increases by 2.2%. At the distance 30 m and elevation 1.5 m, the concentration increased again on all of the plots. Thus roadside green belt with a thickness 10 m is not effective in reducing the concentration of CO at the distance 30 m or in residential areas.

EVALUASI TATA HIJAU JALAN PADA TIGA KAWASAN PEMUKIMAN BERSKALA BESAR DI KABUPATEN BOGOR, JAWA BARAT

In urban development, it is a must in paying attention to and considering the history development of one area that occured in the past, so that legibility of space and special characteristic of the city is formed. Special characteristic of a city can be formed by the existence of space elements, such as path, edges, districts, nodes, and landmarks. This research objectives are to invent all of former Pekanbaru City’s space elements, to find out the most imageable space elements, and to evaluate the factors that have influenced elements have good imageability; and those were undertaken by using survey method. The research result shown that Pekanbaru City has mental map elements with good imageability, and most of them can be identified and imagined both by the citizen of Pekanbaru City as well as by visitors