نتایج جستجو برای: infiltration practices
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Infiltration is the process of water penetration from the ground surface into the soil and is an important process in the hydrological cycle by which surface runoff and groundwater recharge can be linked. Over the years, the importance of the infiltration process resulted in the development of several simplified analytical models for predicting infiltration. These infiltration models range from...
Quantitative description of the spatial variability of soil hydraulic characteristics is crucial for planning, management and the optimum application. Field measurement of infiltration is very expensive, time-consuming and laborious. Soil structure also important effects on water infiltration in the soil. The objectives of this study were to determine the spatial variability of water infiltrati...
Use of the double ring infiltrometer to measure soil water infiltration in center pivot irrigation systems isn’t an accurate approach because the real conditions of infiltration under center pivot sprinklers is different from what happens in the double ring. In this study the infiltration parameters were evaluated in real conditions of a center pivot system. For this purpose a single ring...
The process of infiltration is one of the most important components of the hydrological cycle. On the other hand, the direct measurement of infiltration process is difficult, time spending and expensive. Infiltration models play a main role in managing water resources. Therefore, different types of models with various degrees of complexity were developed to reach this aim. So, this research ca...
The lack of strategic planning in stormwater management has made rapidly urbanizing cities more vulnerable to urban water issues than the past. Low infiltration rates, increase peak river discharge, and recurrence floods waterlogging are clear signs unplanned rapid urbanization. As with many other low middle-income countries, India depends on its conventional centralized drains for managing run...
In his seminal paper on the solution of infiltration equation, Philip (1969), https://doi.org/10.1016/b978-1-4831-9936-8.50010-6 proposed a gravity time, tgrav, to estimate practical convergence time and domain validity infinite series expansion, TSE, for describing transient state. The parameter tgrav refers point in where is dominated equally by capillarity as derived from first two (dominant...
flood spreading stations were constructed in iran with different objectives such as groundwater recharge and vegetation recovery. accumulation of sediment can be a major problem in flood spreading stations. according to generally accepted theories, floods and salt pollution can reduce gradually the infiltration rate. in order to investigate this issue, 13 flood spreading stations were selected ...
lymphocytic infiltration of jessner-kanof is a chronic, benign t cell infiltration disorder of exposed skin with unknown etiology. in some instances, these lesions are induced or aggravated by light exposure. in this case report, we are going to describe an interesting occupationally related skin disease, jessner's disease, after several years working with computer. on the basis of literature r...
For companies seeking to operate and expand in China, as in any market, numerous permits, approvals, and reviews are required before they can proceed. From selling products to creating new manufacturing facilities, these processes—often referred to generally as “administrative licensing”—are necessary steps to invest, expand and conduct commercial operations in China. While administrative licen...
This article is reprinted with permission from StandardView (volume 4, #1), a publication of the ACM dedicated to improving the standards. The issue, titled "Best Practices for Standardization" was guest-edited by Jonathan Morell, a Principal Member of the Technical Staff at the Industrial Technology Institute's Center for Electronic Commerce. Information on StandardView can be obtained from th...
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