نتایج جستجو برای: hydrus 2d

تعداد نتایج: 83440  

Journal: :Chemosphere 2009
Katerina M Dontsova Judith C Pennington Charolett Hayes Jiri Simunek Clint W Williford

Live-fire training exercises can result in particulate propellant contamination on military training ranges and can potentially contaminate ground water. This study was conducted to evaluate dissolution of the 2,4-dinitrotoluene (2,4-DNT) and 2,6-dinitrotoluene (2,6-DNT) from the propellant formulation, M1 (87.6% nitrocellulose, 7.3% 2,4-DNT, 0.57% 2,6-DNT, 1.06% diphenylamine, 3.48% dibutyl ph...

طراحی و مدیریت دقیق سیستم‌های آبیاری قطره‌ای، مستلزم داشتن اطلاعات مناسب از ابعاد جبهه رطوبتی (قطر و عمق خاک خیس شده توسط قطره‌چکان‌ها) در بافت‌های مختلف خاک است. پارامترهای مهمی همچون ویژگی‌های هیدرولیکی خاک، دبی خروجی قطره‌چکان و زمان آبیاری بر ابعاد پیاز رطوبتی تاثیر می‌گذارند. در این پژوهش، مدل‌های نیمه‌تجربی جدید برای تخمین عمق و حداکثر قطر جبهه رطوبتی خاک تحت منبع نقطه‌ای در خاک‌هایی با ب...

Journal: :Water 2023

Soil heterogeneities can impact hillslope hydropedological processes (e.g., portioning between infiltration and runoff), creating a need for in-depth knowledge of governing water dynamics redistribution. The presented study was conducted at the SUPREHILL Critical Zone Observatory (CZO) (hillslope vineyard) in 2021. A combination field investigation (soil sampling monitoring campaign) numerical ...

Journal: :Journal of environmental quality 2006
Katerina M Dontsova Sally L Yost Jiri Simunek Judith C Pennington Clint W Williford

Low-order detonations and blow-in-place procedures on military training ranges can result in residual solid explosive formulations to serve as distributed point sources for ground water contamination. This study was conducted to determine if distribution coefficients from batch studies and transport parameters of pure compounds in solution adequately describe explosive transport where compounds...

Journal: :Journal of glaucoma 2015
Ian Grierson Hady Saheb Malik Y Kahook Murray A Johnstone Iqbal I K Ahmed Andrew T Schieber Carol B Toris

PURPOSE To assess the biocompatibility of a novel implant made of Nitinol (nickel-titanium alloy), designed to improve aqueous humor outflow. MATERIALS AND METHODS In the first arm of biocompatibility testing, microstents were surgically inserted into Schlemm's canal (SC) of 2 non-human primates (NHPs), and a third NHP served as a surgical sham control. After 13 weeks the animals were killed,...

2012
Renáta Sándor Nándor Fodor

This paper presents two soil temperature models with empirical and mechanistic concepts. At the test site (calcaric arenosol), meteorological parameters as well as soil moisture content and temperature at 5 different depths were measured in an experiment with 8 parcels realizing the combinations of the fertilized, nonfertilized, irrigated, nonirrigated treatments in two replicates. Leaf area dy...

Journal: :Horticulturae 2023

Japanese plum (Prunus salicina) farming in the Western Cape (South Africa) is an important industry for export market and job creation a large water user; however, adequate information on requirements of this crop not available semi-arid area. The objective study was to determine seasonal purpose use planning allocation. made experimental data from four fully bearing, high-yielding orchards (cv...

Journal: :Soil 2022

Abstract. We studied the long-term impact of contrasting tillage and cover cropping systems on soil structure hydraulic properties. Complete water retention conductivity curves for top (0–5 cm) subsurface (20–25 soils were characterized contrasted. Dynamic storage evaluated using numerical simulations in HYDRUS-2D software. Compared with standard-till (ST) no-cover-crop (NO) systems, under no-t...

ژورنال: :پژوهش آب در کشاورزی 2015
محسن قره شیخ بیات محمدرضا خالدیان محمدحسن بیگلویی پریسا شاهین رخسار

امروزه استفاده از آبیاری قطره­ای برای محصولاتی که به­صورت ردیفی کشت می­شوند رایج است. یکی از انواع آبیاری قطره­ای، تیپ زیرزمینی می­باشد. به­منظور طراحی و مدیریت سامانه آبیاری قطره­ای دانستن ابعاد خیس­شدگی ضروری­ست. با توجه به داشتن هزینه بالا و زمان­بر بودن اندازه­گیری­های مزرعه­ای، استفاده از مدل­های شبیه­ساز توصیه می­شود.در همین راستا پژوهش حاضر با هدف بررسی کارایی سه مدل تجربیکندلوس و همکارا...

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