نتایج جستجو برای: drainage coefficient modification

تعداد نتایج: 334978  

Journal: :International braz j urol : official journal of the Brazilian Society of Urology 2006
Carlos A Cury Reinaldo Azoubel Fernando Batigalia

OBJECTIVE Morphometrically analyze the cells nuclei of the basal layer of the prostatic glandular epithelium in 20 patients aged between 57 and 85 years presenting benign prostatic hyperplasia with severe symptoms, catheterized or not. MATERIALS AND METHODS Patients with score of severe prostatic symptoms (with indication for transurethral resection of the prostate) were distributed according...

2012
Jon D. Pelletier

[1] Understanding and quantifying the long-term suspended sediment discharge of drainage basins is a key goal of geomorphology, with important implications for the study of water quality, agricultural sustainability, and the evolution of landscapes and sedimentary basins over geologic timescales. Previous studies have highlighted the importance of relief/slope, precipitation, temperature, veget...

2010
T. W. Appelboom R. W. Skaggs J. W. Gilliam D. Amatya

Watershed modeling has become an important tool for researchers. Modeling nitrate transport within drainage networks requires quantifying the denitrification within the sediments in canals and streams. In a previous study, several of the authors developed an equation using a term called a mass transfer coefficient to mathematically describe sediment denitrification. This equation takes into acc...

1998
TOMMY S. W. WONG YUNJIE LI

By considering the urbanization process on an overland plane whereby a relatively rough permeable surface is replaced by a relatively smooth impermeable surface, the effect of urbanization on the time of concentration is assessed. In the assessment, two opposing urbanization sequences are considered: one from downstream to upstream, and the other from upstream to downstream. The assessment is c...

Journal: :Computers, Environment and Urban Systems 2009
Lawrence V. Stanislawski

The United States Geological Survey has been researching generalization approaches to enable multiple-scale display and delivery of geographic data. This paper presents automated methods to prune network and polygon features of the United States high-resolution National Hydrography Dataset (NHD) to lower resolutions. Feature-pruning rules, data enrichment, and partitioning are derived from know...

Journal: :Applied sciences 2023

Drainage coefficient has an important influence on the determination of scale drainage engineering and agricultural production. This paper calculated based calculation results theoretical runoff using empirical formula (QE) average draining method (QA), discussed duration (TE) corresponding to area range (FA) formula. The showed that observed was less than runoff. design flow Wanyan River pumpi...

Journal: :محیط شناسی 0
المیرا تاروردیزاده کارشناس ارشد مهندسی عمران محیط زیست دانشگاه تهران علی ترابیان استاد دانشکدة تحصیلات تکمیلی محیط زیست دانشگاه تهران ناصر مهردادی استاد دانشکدة تحصیلات تکمیلی محیط زیست دانشگاه تهران علی اکبر عظیمی استادیار بازنشسته دانشکدة تحصیلات تکمیلی محیط زیست دانشگاه تهران

utilization authorities in sewage companies considered to sludge dewatering methods due to problems and challenges in this field. dewatering by sludge drying beds is considered in present study. this method is preferred to mechanical methods due to the need for very simple technology. due to restriction of natural dewatering, we tried to eliminate some of these limitations by the tests and stud...

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