نتایج جستجو برای: hydrus 1d
تعداد نتایج: 21837 فیلتر نتایج به سال:
پیچیدگی، تنوع و مدیریت نادرست آلایندههای کشاورزی و حجم زیاد تلفات آب به دلیل طراحی و مدیریت نادرست سیستمهای آبیاری و زهکشی منجر به افزایش سهم کشاورزی در آلودگی منابع آب، خاک و محیط زیست شده است. کنترل و کاهش آلودگی نیتروژن موجود در کود نیازمند شناخت چرخه بیولوژیکی آن‌ها در اکوسیستم می‌باشد. هدف از این تحقیق شبیهسازی چرخه نیتروژن با استفاده از مدل HYDRUS–1D و ارزیابی تاثیر میزان رطوبت خاک بر ضری...
[1] In the past two decades significant progress has been made toward the application of inverse modeling to estimate the water retention and hydraulic conductivity functions of the vadose zone at different spatial scales. Many of these contributions have focused on estimating only a few soil hydraulic parameters, without recourse to appropriately capturing and addressing spatial variability. T...
This study investigated the ability of a HYDRUS 1D model for predicting vertical distribution potassium iodine (200 ppm) in soil columns after amendment with five different common remediation materials (gypsum, lime, fly ash, charcoal, and sawdust) at rate 2.5% (w/w), relative to an unamended control soil. Results showed that soil, leaching was decreased by all amendments but magnitude decrease...
Innovative irrigation solutions have to face water scarcity problems affecting the Mediterranean countries. Generally, surface (DI) or subsurface drip irrigation systems (SDI) have the ability to increase water productivity (WP). But the question about their possible utilization for crops such as corn would merit to be analysed using an appropriate economic tool. The latter would be necessary b...
Knowledge of soil moisture dynamics in the unsaturated soil zone provides valuable information on the temporal and spatial variability of groundwater recharge. This is especially true for the Mediterranean region, where a substantial fraction of long-term groundwater recharge is expected to occur during high magnitude precipitation events of aboveaverage wet winters. To elucidate process unders...
Factors affecting preferential flow and transport in the vadose zone need to be investigated by experiments and simulations to protect groundwater against surface applied chemicals. The objectives of this study were to investigate the effects of several factors (soil structure, initial soil water content (SWC), and application rate) and their interactions on the extent of preferential flow and ...
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