Soil water infiltration is central to hydrologic studies and lends itself for detailed experimentation mathematical–physical modeling. The most rigorous of these approaches numerically solve Richards’ equation, possibly coupled through a heterogeneous soil surface routine groundwater model. This approach computationally expensive prone mass balance errors overparameterization. Analytic solution...

This study analyzes the soil water infiltration characteristics under muddy irrigation and bio-organic fertilizer conditions in current context of rarely being used agricultural production combination with problems resource shortages low fertility arid semi-arid regions. An indoor one-dimensional column device was for studying effects four sediment concentration levels (ρ0: 0; ρ1: 4%; ρ2: 8%; ρ...

abstract- to study the effect of tree roots on increasing water infiltration in soil and also to determine and assess the coefficients of different infiltration models, some infiltration tests were performed in three tree plantation areas in badjgah, fars province with different soil textures (clay loam for pear plantation, sandy loam for grape plantation, loamy sand for pine trees). in each pl...

interrupting the processes which control ecosystem resources has dramatic impacts on the rangeland conditions. to protect ecosystems and landscape, it needs to understand the ecosystem processes which regulate the ecosystem resources. as main components of ecosystems, patches and inter-patches play important roles in energy and materials cascade. ecologically, functional parameters such as stab...

bioretention or rain garden is a preferable low impact development (lid) approach due to its characteristics which reflect natural water cycle processes. however, this system is still little understood and quite complicated in terms of design and implementation due to many technical considerations. hence, this paper gives a review of the challenges and developments for the use of bioretention f...

The Beerkan infiltration experiment is carried out by inserting the ring a short depth into soil and establishing positive head of water on surface for at least part run. Nevertheless, data are analyzed assuming fully unconfined process (ring insertion depth, d = 0 cm) null ponded (H cm). influence an 2 h sampled every minute was tested in this numerical investigation. Five soils varying from s...

BACKGROUND Pain is an important consideration after renal surgery. A multimodal approach to postoperative pain management could enhance analgesia by risking fewer side effects after surgery. OBJECTIVES The aim of this study was to evaluate the clinical efficacy of the subcutaneous infiltration of ketamine and tramadol at the incision site to reduce postoperative pain. METHODS Sixty-four pat...

the crankshaft is one of the most critically loaded components as it experiences cyclic loads in the form of bending and torsion during its service life. its failure will cause serious damage to the engine so it’s important at the time of design to verify fatigue strength. more challenges in crankshaft design due to increasing vehicle payloads, lower weight requirement, higher efficiency and lo...

An automatic triple-ring infiltrometer was developed using a set of pre-set sensors and transducer (AP 403, AP 404, 405 406, RAP001 RAP002). The aluminum probe were graduated arranged in series to monitor the rate at which water is infiltrating into soil layer. working principle six probes with depth calibration 1.0mm, 26.7 mm, 12.4 12.7 respectively. result obtained showed strong agreement coe...