SORU: aşağıdaki parçaya göre cevaplayınız
According to the passage, flooding-----.
Land cleared of trees is exposed to erosion, which
can be severe in deforested areas having slopes
greater than 15 to 17 percent. If land is not
disturbed any further and new growth becomes
established, erosion may gradually subside. If,
however, vegetation on the cutover land is
continually removed by man or livestock, erosion
will intensify, and environmental problems can be
severe. When a forest is removed from a slope,
the rate of water runoff is increased two to tenfold
or more, depending on the degree of clearing,
slope, and rainfall. All too often this leads to
flooding of agricultural land in the lowlands. In
Pakistan, for example, almost 2 million hectares of
standing crops on the lowlands were destroyed by
floodwater in 1973, and about 10,000 villages were
wiped out. Since valuable soil is lost in floods, the
quantity of the arable lands decreases. Alluvial silt
deposited elsewhere is rarely usable enough to
compensate for such losses.