انت هنا الان : شبكة جامعة بابل > موقع الكلية > نظام التعليم الالكتروني > مشاهدة المحاضرة
الكلية كلية الهندسة
القسم الهندسة البيئية
المرحلة 4
أستاذ المادة نسرين جاسم حسين المنصوري
05/07/2018 19:26:41
Instructional Objectives At the end of this lesson, the student shall be able to learn 1. The ways by which water moves below ground. 2. How water is stored underground in soil and fractured bedrock. 3. What is water table and its relation to saturated and unsaturated ground water. 4. Pressure measurement in uns aturated and saturated soil water. 5. The theory behind movement of water in the unsaturated zone. 6. The theory behind movement of water in the saturated zone, also called as ground water. 7. What are equipotential and flow lines. 8. What are aquifers and confining layers. 9. Qualitatively, the ground water flow movement in confined and unconfined layers. 10. The definitions of water storage, and t he portion of that wh ich can be withdra3wn from an aquifer. 2.5.0 Introduction In the previous lectures of this module, we talked about th e hydrologic cycle, which is a continuous process of transfo rmation of water in the form of water vapour as it evaporates from land and ocean, dr ifts away to clouds and cond enses to fall as rain. Of the rain falling over the land surface, a part of it infiltrates into the soil and the balance flows down as surface runoff. From the point of view of water resources engineering, the surface water forms a direct source wh ich is utilized for a variety of purposes. However, most of the water that infiltrates into the soil travels down to recharge the vast ground water stored at a depth wit hin the earth. In fact, the ground water reserve is actually a huge source of fres h water and is many times that of surface water. Such large water reserves remain mostly untapped though locally or regionally, the withdrawal may be high. Actually, as a result of excess withdrawal of ground water in many places of India (and also of the world) , a number of problems have arisen. Unless the water resources engineer is aware of the consequent damag es, this type of situation would lead to irreversible change in the quality and quantity of subsurface water which likely to affect our future generations. In this lecture it is proposed to study how t he water that infiltrates into the soil and the physics behind the phenomena. We have deliberately separated the study of subsurface movement of water from that of surface flow, as discussed in the earlier lectures, because of the fact that the scale of mo vement of these two types of flows can vary by an order of magnitude 10 to more than 1000! This would be clear from Figure
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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