National Hydrology committee of Afghanistan (NHCA ...

conclusion
‣ The principal reservoirs of Afghanistan are rapidly losing their
storage capacity and day by day exacerbated because of high rates
of sediment influx and accumulation.
‣ The factors that promote sedimentation in the reservoirs include
land use, steep drainage basin slopes and relief, and most
importantly, high rainfall magnitudes and frequencies and lack of o
maintenance due to prolong war.
‣ connecting reservoirs at high elevations with those at lower
elevations, results in an increased drainage area and available
water. As the upstream reservoirs fill with sediment, however, the
bottoms reach the outlet structures and sediment is bypassed into
the lower reservoirs, accelerating the sedimentation rates in these
impoundments.