By Kevin M. Hiscock, Victor F. Bense
Hydrogeology: rules and perform offers a accomplished creation to the examine of hydrogeology and the importance of groundwater within the terrestrial aquatic setting.
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Extra resources for Hydrogeology: Principles and Practice
The aquifer layers act as conduits for groundwater ﬂow. If the ratio of the aquifer to aquitard hydraulic conductivities is greater than 100, then ﬂow lines are almost horizontal in aquifer layers and close to vertical across aquitards. 1). where dh1 is the decrease in head across distance dl1 and dh2 is the decrease in head across distance dl2. In that dl1 and dl2 bound the same two equipotential lines, then dh1 equals dh2; and from a consideration of the geometry of Fig. 4, a = b ⋅ cos q1 and c = b ⋅ cos q2.
In the ﬁrst example, the alluvial aquifer shown in Fig. 1 is recharged by meltwater runoff from the adjacent impermeable mountains that run parallel to the axis of the valley. If the groundwater that collects in the aquifer discharges to the river, then it is possible to estimate the river ﬂow at the exit from the valley. 5 and the information given in Fig. 1, as follows: contact with the water table and is directly contaminating the aquifer. The problem is to estimate the time taken for dissolved solutes to reach a spring discharge area located down-gradient of the waste tip.
A. (1997) Global Hydrology: processes, resources and environmental management. Addison Wesley Longman, Harlow. E. ) (2004) Theme issue: groundwater – from development to management. Hydrogeology Journal 12(1). Price, M. (1996) Introducing Groundwater, 2nd edn. Chapman & Hall, London. HYDC01 12/5/05 5:44 PM Page 16 16 Chapter One Groundwater development of the Quaternary Aquifer of the North China Plain The Quaternary Aquifer of the North China Plain represents one of the world’s largest aquifer systems and underlies extensive tracts of the Hai river basin and the catchments of the adjacent Huai and Huang (Yellow) river systems (Fig.