Abstrak
Daerah tangkapan sungai Komering Hulu memberi kontribusi nyata terhadap daerah aliran sungai 135,88 m3/det (1971-1991 dan 1992-2010 135.88 m3 / sec (1971-1991 and 1992-2010
The characteristic hydrology of a watershed is playing a major role in ensuring water resource availability. Rainfall and runoff responses in catchment area are part of the hydrology cycles. There are several factors to determine the characteristic of hydrology at the watershed, i.e. geological, region, soil and land cover. The existence of water resources is very substantial for surroundings. The rapid development in various sectors leads to water demands increase. Optimum utilization of water resources is needed in the sustainability of water resources or the need for integrated water resources management. The consequence of development is land use change, resulting in changes inflow characteristics, flood during the wet season and drought or discharge decrease in the dry season. Many studies associate higher watershed land cover with lower baseflows, attributed to high evapotranspiration rates, while other studies indicate increased baseflow with higher watershed land cover due to higher infiltration and recharge of subsurface storage. Adaptation and mitigation efforts are required to anticipate changes in the flow characteristics. The factors are key controls on base flow through their influence on infiltration, catchment and subsurface storage properties. This review underscores the need for more research that multiple aspects of the watershed system in explaining base flow. The result of average base flow and total flow ratio during 40 years (1971-2010) is 0.296 and the class of the hydrologic function as a BF / TF ratio value which indicated very poorly hydrology function of upstream Komering, although in certain hydrologic function was still in the good category.
Synthetic unit hydrograph methods are popular and play an important role in many water resources design especially in the analysis of flood discharge of ungagged watersheds. These methods are simple, requiring only watershed characteristics such as area and river length and in some cases it may also include land use characteristics. Therefore, these methods serve as useful tools to simulate runoff from ungagged watersheds and watersheds undergoing land use change. To develop a synthetic unit hydrograph, several techniques are available. Several most popular unit hydrographs methods such as Nakayasu, Snyder-Alexeyev, SCS, and GAMA-1 are popular and commonly used in Indonesia for computing both peak discharge rate and the shape of flood hydrograph. This paper presents a simple approach for determining a consistent dimensionless unit hydrograph based on mass conservation principles.
Penelitian ini menyajikan Aplikasi Air Detection Environment System berbasis android menggunakan teknologi WSN. Teknologi WSN dengan multi sensor sebagai hardware sistem deteksi kualitas udara di lingkungan parkiran. Aplikasi yang dirancang telah berhasil secara otomatis mendeteksi kualitas udara akibat gas buang kendaraan berupa CO, CO2, HC, PM10, suhu dan kelembaban. Teknologi multi sensor ini dapat mengirimkan data kualitas udara ke server dan ditampilkan aplikasi android berupa tampilan status kualitas udara serta menampilkan waktu dan lokasi kejadian. Adapun kelebihan aplikasi ini ialah masyarakat bisa mengetahui kondisi lingkungan di parkiran secara praktis, real time dan mobile karena cukup membuka aplikasi yang ada di smartphone Diharapkan dengan adanya aplikasi ini dapat meningkatkan keselamatan dan kewaspadaan pada individu terhadap kualitas lingkungan yang tidak sehat.
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