The movement of water flow usually has history and path dependence. Fractional calculus is very suitable for describing the process with memory hereditary properties. In this study, order differential equation in Nash confluence system was extended from integer to fractional order. On basis Laplace transform, instantaneous unit hydrograph obtained, which used describe long-term basin system. Fu...

the potential of six economically cheap agricultural waste materials, viz. rice husk, betel nutpeels, sugarcane molasses, tea waste, mustard oil cake and saw dust, was investigated for copper and leadremoval from aqueous solutions under batch and continuous conditions. the effect of ph, contact time,sorbent dose and initial metal ion concentration on the uptake of copper and lead was first exam...

Due to geographic and climatic conditions in mountainous northwest area, Roads in these areas are often covered with snow, ice and mud. Hence Transportation of equipment and soldiers encounter hardship and difficulties in rural area and specially outposts. To solve these problems, it is needed to fabricate portable roadway or traction mats. These high strength mats cover surface of roads and ar...

The application of the polder system for flood control in DKI Jakarta has become a must coastal areas, especially with construction sea dikes along coast as solution to anticipate tidal flooding. One thing consider when using is how much pump capacity and reservoir are needed. To answer this quetions, hydrological analysis been carried out several method approaches, starting from determining ra...

[Background] Mountain torrent disasters are one of the deadliest weather-related natural in world, often causing extremely serious economic and property losses casualties; recent years, due to heavy rainfall complex geological geomorphological conditions, mountain have occurred frequently Gansu Province. An effective rainfall-runoff model is key prevent them. There still many problems about how...