نتایج جستجو برای: net recharge effective infiltration
تعداد نتایج: 828290 فیلتر نتایج به سال:
It is common for subsurface flow to transition between porous and fractured media. Two examples include vertical infiltration of precipitation through a permeable soil overlying a fractured bedrock, and horizontal ground water flow through a combination of porous and fractured geologic units. A reduction in flow or flow impedance may occur across these interfaces caused by head losses associate...
Abstract A two-dimensional sand tank model was designed to investigate the water distribution and sediment clogging of Yellow River during seepage recharge process piedmont gravel channel in North China Plain. Due high permeability medium, only infiltration deep runoff (IDR) surface (SR) occurred experiment. The increase released did not improve effective recharge. IDR accounted for 65–85% rele...
In this study the recharge and discharge of Isfahan-borkhar aquifer was investigated. This leads to long-term management of the aquifer and will make appropriate decisions by planners. The results of this study showed that the water table was constantly decreasing over the selected statistical period. The water table level was reduced by 0.46m per year, which reflects the fact that the aquifer ...
The clogging of infiltration basins is the main problem affecting proper functioning groundwater artificial recharge systems. In this study, several parameters have been varied to understand their impacts on water infiltration. experimental results show that effect initial humidity significant for less porous material such as silty soil (Hamri) and sand. air bubbles are also an important factor...
Rapid infiltration following precipitation may result in groundwater contamination from surface contaminants or pathogens. In fractured rock, can migrate rapidly to points of withdrawals. contrast the temporal availability quality chemical indicators, meteorological and level observations are available real-time estimate time-varying recharge, which act as a surrogate identify periods rapid tha...
in this thesis, a structured hierarchical methodology based on petri nets is used to introduce a task model for a soccer goalkeeper robot. in real or robot soccer, goalkeeper is an important element which has a key role and challenging features in the game. goalkeeper aims at defending goal from scoring goals by opponent team, actually to prevent the goal from the opponent player’s attacks. thi...
This paper presents the results of a detailed field investigation that was performed for studying groundwater recharge processes and solute downward migration mechanisms prevailing in the unsaturated zone overlying a chalk aquifer in Belgium. Various laboratory measurements were performed on core samples collected during the drilling of boreholes in the experimental site. In the field, experime...
Electrical resistivity imaging has been successfully used to monitor near-surface hydrologic processes but use of standard measurement arrays may not provide the greatest data sensitivity to the imaged region. We present a method of experimental design based on the concept of informed imaging for creating an electrical resistivity imaging experiment to monitor flow beneath a recharge pond. Info...
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