Those values were equal to evapotranspiration. Ada begitu banyak komponen di dalam mesin screw press ini, mulai dari komponen berukuran kecil sampai komponen. Decreasing soil moisture in 60 cm root depth were 4.28 mm/day. kelapa sawit memegang peranan penting meningkatkan pendapatan negara dari sektor perkebunan (Tondok, 1998). buah kelapa sawit menjadi minyak sawit dan produk samping berupa inti (kernel). Decreasing soil moisture in 30 cm root depth were 2.40 mm/day. Cara analisa komponen crude oil yaitu Sampelcrude oil di masukkan pada tabung centrifuge yang berkapasitas 14,5 ml. The average value of interception varied between 0.51 mm and 4.32 mm or from 0.64% to 19.20%. Generally, the interception values increase with the increase of rainfall, yet the percent of intercepted rainfall decreased, also the interception decreased stemflow and throughfall. The throughfall were obtained varied from 5.00 mm to 87.47 mm or from 73.00% to 127.84%. The stemflow values of each rainy day were obtained varied from 0.38 mm to 7.45 mm. fewer than 1%, therefore the value used for measuring interception was adapted from research conducted by Purba (2007) i.e. The value of stemflow obtained in field observation was very low i.e. Stemflow and throughfall were increasing as the increase of rainfall. The results showed that there were 16 rainy days in 3 months period of observation which variation of daily rain from 4.83 mm/day to 95.53 mm/day. This research was aimed to determine interception, stemflow, throughfall, and evapotranspiration. Evapotranspiration is the loss of water through the soil and plant surfaces. Besides the interception, the water loss can be caused by evapotranspiration. The loss of water through interception is an important part of the hydrologic cycle. Hasil penelitian menunjukkan bahwa kestabilam komponen hayati pendukung ekosistem di perkebunan kelapa sawit dan karet ditinjau dari aspek nilai indeks keanekaragaman hayati (H) berada dalam kategori rendah, pada vegetasi perkebunan kelapa sawit (Elaeis guineensis Jacq), tingkat anak pohon (0,57), tingkat tumbuhan bawah (0,83), dan tingkat. Rainfall interception is a process of keeping temporarily of the rain water on vegetation before evaporated back into the atmosphere.
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