2. Landfill investigation
(1) Overview of the landfill
The domestic waste landfill was built at the end of 1985, and has been built with
five phases of landfilling areas up to now, playing an important role in the treatment
of the municipal solid wastes of Shanghai and assuring its safety management. The
landfill, with a regular shape and flat terrain, has a daily average waste disposal
capacity of 8000 tons/day and a design domestic waste storage capacity of 20
million tons. Meanwhile, the Old Port landfill is provided with the groundwater
control system, the percolate drainage system and the gas drainage system, with the
Table 5.107 Characteristics of hydrogeological conditions in Old Ports Area
Hydrogeological
layer
Genetic
type
Dominant
lithology
Thickness Salinity
Water
yield
property
Hydrochemical
type
Phreatic aquifer
Estuary
—
littoral
Sandy silt,
clayey silt,
silty clay
3–15
3–10 in
the east
and 1–3 in
the
midwest
>5
Cl–Na
Cl Á HCO 3 –Na
The first confined
aquifer
Estuary
—
littoral
Sandy silt,
fine sand
20–30
3–10
1000–
3000
Cl–Na
Cl–Na Á Ca
The second
confined aquifer
Estuary
—
littoral
Silt,
medium
fine sand,
medium
coarse
sand with
gravels
10–30
3–10
1000–
3000 in
the north
and
greater
than 3000
in the
south
Cl–Na
Cl–Na Á Ca
The third
confined aquifer
Estuary
—
littoral
Fine silty
sand, fine
sand
30–50
>10
1000–
3000
Cl–Na
The fourth
confined aquifer
River
Fine sand,
medium
coarse
sand with
gravels
Greater
than 70
11
1000–
3000 in
the north
and
greater
than 3000
in the
south
Cl Á HCO 3 –Ca
The fifth
confined aquifer
River
Fine sand,
medium
coarse
sand with
gravels
30–50
<1 in the
north and
gradually
growing
to 1–3 in
the south
00–1000
HCO 3 Á Cl–Na
Cl–Na
Cl Á HCO 3 –Na
5.6 East China
331
(1) Overview of the landfill
The domestic waste landfill was built at the end of 1985, and has been built with
five phases of landfilling areas up to now, playing an important role in the treatment
of the municipal solid wastes of Shanghai and assuring its safety management. The
landfill, with a regular shape and flat terrain, has a daily average waste disposal
capacity of 8000 tons/day and a design domestic waste storage capacity of 20
million tons. Meanwhile, the Old Port landfill is provided with the groundwater
control system, the percolate drainage system and the gas drainage system, with the
Table 5.107 Characteristics of hydrogeological conditions in Old Ports Area
Hydrogeological
layer
Genetic
type
Dominant
lithology
Thickness Salinity
Water
yield
property
Hydrochemical
type
Phreatic aquifer
Estuary
—
littoral
Sandy silt,
clayey silt,
silty clay
3–15
3–10 in
the east
and 1–3 in
the
midwest
>5
Cl–Na
Cl Á HCO 3 –Na
The first confined
aquifer
Estuary
—
littoral
Sandy silt,
fine sand
20–30
3–10
1000–
3000
Cl–Na
Cl–Na Á Ca
The second
confined aquifer
Estuary
—
littoral
Silt,
medium
fine sand,
medium
coarse
sand with
gravels
10–30
3–10
1000–
3000 in
the north
and
greater
than 3000
in the
south
Cl–Na
Cl–Na Á Ca
The third
confined aquifer
Estuary
—
littoral
Fine silty
sand, fine
sand
30–50
>10
1000–
3000
Cl–Na
The fourth
confined aquifer
River
Fine sand,
medium
coarse
sand with
gravels
Greater
than 70
11
1000–
3000 in
the north
and
greater
than 3000
in the
south
Cl Á HCO 3 –Ca
The fifth
confined aquifer
River
Fine sand,
medium
coarse
sand with
gravels
30–50
<1 in the
north and
gradually
growing
to 1–3 in
the south
00–1000
HCO 3 Á Cl–Na
Cl–Na
Cl Á HCO 3 –Na
5.6 East China
331