The
latest NDMA reports show that the lake level at Attabad is at its highest level to date, but is holding steady. As before, I have used the reports and the NDMA data to reconstruct the lake level data, to produce a graph that is consistent with NDMA for the last two weeks:
Meanwhile, it appears that the discharge through the spillway has increased again, once more using the NDMA data:
This allows us to look at the discharge - lake level graph again:
The most recent three values are indicated by open diamonds. There are some suggestions that operations are underway again to widen the spillway, which may explain the increased discharge, but I have no way of verifying this suggestion.
Finally,
the press are also reporting that the IDPs will be allowed to return to their villages in early August, when the river discharge has peaked. Fortunately the enhanced level of landslide activity from the Attabad scar that was observed last week has now reduced.
Divalent- Dr. Dave has already stated that it's not possible for a landslide to fortify the dam--Trust him.
ReplyDeleteThat said, there must be some reason that the lake is rising, but the outflow is decreasing. As Dr. Dave put it, "This increase in lake level is interesting though because at the same time the reported outflows have declined from those of a week or so ago."
What more can I say?
Make that just the Teton Dam, strike Grand, which is an altogether different flavor.
ReplyDeleteOne of the latest Pamir Times photos shows the upper tongue terminating at a ledge running straight across about half the stream width from the right bank. Perhaps the underlying slab is rotating upstream because of undermining at the upstream end. At this flow level I would expect to see backcurling waves below the ledge, but perhaps there's not much drop at that point.
ReplyDeleteThe rotation of that slab could explain the increase of lake level. The top of the flow now shows a drop by the left bank boulder that was blasted. Water in the tongue below seems to be shifting left above the new ledge.
Detailed photos and videos of the water are much appreciated.
George