below the surface. The groundwater is the bedrock fissure water, mainly replenished by the infiltration of atmospheric precipitation. The prevailing flow direction
of groundwater is from northwest to southeast.
③ Hydrogeological conditions
The hydrogeological exploration shows that the groundwater in the hazardous
wastes disposal site may be divided into two types, namely the bedrock fissure
water and karst water. The bedrock is dominated by dolomite and limestone which
are carbonates. The groundwater is mainly recharged by the infiltration of concentrated precipitation. The hydrogeological section of the hazardous wastes disposal site is illustrated in Fig. 5.107.
④ Layout of monitoring wells
According to the hydrogeological survey, the hazardous wastes disposal site has the
groundwater categorized as the “upland and hill karst water and fissure water” in
the standard hazardous wastes disposal site as provided in the Technical Guide for
the Investigation of Groundwater Background Conditions of Hazardous Wastes
Disposal Sites. The collection of early information and field inspection demonstrated that two of the existing six groundwater monitoring wells (3#, 5#) did not
Fig. 5.106 Field survey
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5 Application Cases