model simulasi numerik resapan pada tanah organik dengan variasi curah hujan

Air tanah sebagai salah satu sumber air bersih perkotaan yang hanya seringkali dimanfaatkan, dimana masih kurang dilakukan upaya-upaya konservasi. \ud \ud Belum terkendalinya pemanfaatan air tanah mengakibatkan penurunan debit dan kualitas air tanah. Perubahan tata guna tanah di daerah resapan akibat pembangunan untuk pengembangan permukiman, industri dan fasilitas perkotaan diperkirakan telah mengganggu siklus hidrologi. \ud \ud Dalam upaya untuk memaksimal potensi resapan air tanah, terutama pada tanah organik perlu diadakan penelitian ini. Adapun tujuan dari penelitian ini adalah: mengetahui hubungan antara resapan (infiltasi) dengan variasi kepadatan tanah, mengetahui hubungan antara resapan (infiltasi) dengan variasi intensitas curah hujan dan Mengetahui hubungan antara resapan (infiltasi) dengan variasi kemiringan lahan.\ud \ud Hasil penelitian menunjukkan bahwa penambahan intensitas curah hujan akan menambah besarnya nilai resapan, dimana resapan akan semakin besar jika intensitas curah hujan meningkat dan penambahan persentase kepadatan tanah serta kemiringan lahan akan mengurangi nilai dari resapan itu sendiri, dimana semakin besar kepadatan tanah serta kemiringan lahan, semakin menurun pula nilai resapan yang terjadi. \ud \ud Kata kunci: Resapan (infiltrasi), tanah organik, kepadatan, intensitas curah hujan \ud \ud Ground water is as a source of urban water is often only used, which is still less do conservation efforts.\ud Unbridled has not resulted in decreased utilization of ground water discharge and groundwater quality. Changes in land use in catchment areas from development to development of residential, industrial and urban facilities is estimated to have disrupted the hydrological cycle.\ud In an effort to maximize the potential for ground water recharge, especially on organic soils need to be conducted this study. The purpose of this research is: know the relationship between recharge (infiltration) with variations in soil density, determine the relationship between recharge (infiltration) with variations in rainfall intensity and Knowing the relationship between recharge (infiltration) with variations in slope.\ud The results showed that the addition of the intensity of rainfall will increase the size of the catchment, where the absorption will be greater if the rainfall intensity increases and the addition of soil density and percentage of slope will reduce the value of the absorption itself, where the greater density of the soil and the slope of the land, the decreases the value of absorption occurs.\ud Key words: Resapan (infiltration), organic soil, density, intensity of rainfall and slope of the land\ud DENSITY EFFECT OF MODEL EXPERIMENTS, rainfall intensity and slope of the catchment OF THE SOIL ORGANIC\ud A. BACKGROUND\ud Groundwater as a source of urban water is often only used, still less do conservation efforts. Unbridled has not resulted in decreased utilization of ground water discharge and groundwater quality. For the region that is located close to the coast is very vulnerable to the entry of seawater into the aquifer layer (saltwater intrusion).\ud In addition, the vacancy-free layers of aquifers can lead to a decrease in the surface soil, which is dangerous to life and infrastructure. Changes in land use in catchment areas from development to development of residential, industrial and urban facilities is estimated to have disrupted the hydrological cycle chain. The rapid physical development as a joint effect of high population growth, economic growth and rapid development of tourism, land cover caused by water-resistant buildings (concrete, asphalt, and the like) will cause a reduction in infiltration of rainwater into the ground, and increases the amount of running around the surface (surface run-off).\ud \ud On the other hand the soil water reserves to be greatly reduced, because running around the surface will quickly toward the drainage channels and directly discharged into the sea. With this background, it is very interesting to do research / study on the potential seepage of rain in the context of flood control and water conservation land