Since 2014 sedimentation at the estuary of Jelitik river, Sungailiat, Bangka has continued to increase. At this estuary, the ship traffic is very busy and there is National Fisheries Port Sungailiat. When the tide is low, the river mouth closes thus disrupting ship traffic. The Bangka Belitung Provincial Government is currently planning to build a sediment control infrastructure to reduce the sedimentation rate. To plan and determine the effectiveness of the jetties requires knowledge of sedimentation patterns around Jelitik estuary. Therefore this study was conducted to determine the pattern of sedimentation (distribution and rate) at the existing and ultimate conditions. The methods are field survey, analysis of field data, and computational modeling of sediment transport. Modeling of sediment transport was done using the Sand Transport Module of MIKE 21. Two scenarios were simulated for the existing and ultimate conditions. Based on this modeling, the sedimentation rate at Jelitik estuary is found uneven. In the existing condition, a large rate of sedimentation occurs on the southern side of the Jelitik River estuary, which reaches a maximum value of 2.75 m/year, with an average of 4.44 cm/year. Whereas in the ultimate condition, the sedimentation rate decreases to 0.0377 m/year.

Pendahuluan: Kadar magnesium serum yang tinggi saat masuk rumah sakit terkait dengan volume hematoma masuk yang kecil, dengan skor National Institutes of Health Stroke Scale (NIHSS) yang lebih rendah. Tujuan: Menilai hubungan kadar magnesium serum, volume hematoma, dan derajat klinis pada pasien stroke perdarahan intraserebral supratentorial akut. Metode: Penelitian ini menggunakan desain potong lintang terhadap pasien stroke perdarahan intraserebral supratentorial akut, dengan diperiksa kadar magnesium serum dan dinilai derajat klinis stroke berdasarkan NIHSS yang dirawat di RSUP Dr. Wahidin Sudirohusodo, Makassar pada bulan Januari hingga April 2019. Hasil: Didapatkan 32 subjek (18 laki-laki, 14 perempuan) dengan rerata usia 55,81+0,496 tahun dan rerata kadar magnesium serum 1,9244+0,49657 mg/dL. Terdapat korelasi yang bermakna antara kadar magnesium serum dengan volume hematoma dan derajat klinis subjek dengan perdarahan intraserebral supratentorial akut. Berdasakan uji korelasi Spearman, terdapat korelasi volume hematoma dengan derajat klinis secara linear positif yang bermakna, bahwa semakin besar volume hematoma, maka semakin besar NIHSS yang artinya derajat klinis semakin berat. Diskusi: Terdapat korelasi bermakna antara kadar magnesium serum, volume hematoma, dan derajat klinis pada pasien perdarahan intraserebral supratentorial akut. Kata kunci: Derajat klinis (NIHSS), kadar magnesium serum, perdarahan intraserebral akut, volume hematoma

Research objectives: mapping the distribution of salt water and knowing the causes of saltwater in the Borobudur Plain. The research population was in the form of community well water, in 6 villages around the Borobudur plain of Magelang Regency. The research variables included the distribution of well water quality (sodium, acid, chloride, salinity, total dissolve solid/TDS) and impact water quality to the community. The results of the study, the distribution of ground water quality in terms of different physical and chemical properties. Candirejo village from the physical and chemical aspects did not match the quality standard, the content of sodium 353-568 mg/l and strong acid content in the form of chloride ranged from 809.9-1639.5 mg/l, while physically DHL at Candirejo ranged from 1,612-3,546 mhos/cm and TDS 1522-1749 mg/l. The best water quality is found in the village of Bumiharjo in terms of both physical and chemical aspects. The cause of salt water in Borobudur Plain was: ground water dominated by alkalis and strong acids with chemical compounds NaCl type of group sulfate water that taste salty and groundwater is dominated by alkaline earth and weak acids, namely water with type (b) semi bicarbonate type.