Judul: Penentuan Tipe Konstruksi Sumur Resapan Berdasarkan Sifat-sifat Fisik tanah dan Kondisi Sosial Ekonomi Masyarakat di Kawasan Puncak
Abstrak: A change of land utilization from agriculture and forest land to either utilization such as for housing area, villa, hotels, and restaurants will have an impact on the decrease of water absorption level and increase of run off. This study is an experimental test on four types of water infiltration well which were placed at eight location at Puncak area. This research had been conducted for six months, from February until July 1998. The objectives of this study are : (1) to analyze the ability of different types of water infiltration well to absorb water; (2) to analyze the correlation between water volume in the water infiltration well and soil's physical characteristics; (3) to analyze the extent of relationship between rainfall intensity as well as width of roof area and the water volume in the water infiltration well; (4) to examine the extent of knowledge and acceptance of the iocal community to the water infiltration well. This studi collected primary data (soil's physical characteristics, water absoption rate, rainfall, water quality of water infiltratior~ well, and socioeconomic), and secondary data. Interviews which were to 50 respondents were carried out chosen by the method of purpossive sampling. The results of water absorption rate measurement in the water infiltration well indicated that the water absorption rate ranges from 0,97 to 5,06 mlday. The highest water absorption rate was occurred at the water infiltration well of type IV. The Pearson's correlation analysis showed that the soil drainage porous, aggregate stability, texture of clay fraction, and infiitration have no significant correlation with the water volume in the water infiltration well (p>0,15). Whereas permeability and texture of sand fraction have a significant correlation with the water volume in the water infiltration well (p<0,15). The multiple regression analysis showed that the width of roof area and the water volume in the water infiltration well have not a significant correlation (p>0,15), while the water volume in the water infiltration well have a significant correlation with rainfall intensity (pc0,15). The extent of respondents knowledge on the water infiltration well was a relatifly low, but most of them have a positive attitude towards water infiltration well. Water quality of the water infiltration well (clearness, DHL, and pH) met the conditions of clean water.
Keyword: 

Judul: Efektivitas Pembangunan Sumur Resapan dalam Pengendalian Limpasan di Kelurahan Pinang Ranti dan Bendungan Hilir Jakarta
Abstrak: Jakarta City development has caused in the decline of open green space quantity. It impacts to decreasing soil infiltration capacity, increasing surface runoff and flood potential. The construction of Sumur Resapan aims to reduce flood potential and improve ground water reserves in Jakarta. RunOff estimation method using SCS-CN obtained value of 1,68 m3 in 77m2 of water catchment area in Pinang Ranti and 2,08m3 in 95m2 of water catchment area in Bendungan Hilir. The average rate of infiltration are 41,34 cm/jam and capable to infiltrate water by 3,33 m3 in Pinang Ranti. The average rate of infiltration are 10,34 cm/jam and capable to infiltrate water by 1,61 m3 in Bendungan Hilir. By the infiltration rate, it can be concluded that Sumur Resapan will not be full or overflowing.The constructon of sumur resapan can reduce runoff and increase soil water reserves so it is able to meet water needs of society, particularly in society who doesn’t affordable yet by PDAM.
Keyword: recharging well, infiltration

Judul: Ornithonyssus Bursa (Berlese, 1888) Famili Macronyssidae yang Menyerang Unggas Dan Penaggulangannnya
Abstrak: Ornithonyssus bursa adalah tungau penghisap darah pada unggas di daerah tropis dan subtropis. Tungau ini relatif kecil, dengan panjang tubuh antara 700-1000 mikron dan lebarnya 250-490 mikron. Tubuhnya bulat berwarna coklat kekuningan sebelum menghisap darh dan berwarna merah setelah menghisap darah dari induk semangnya.
Keyword: