Disaster management strategy for potential slide zones of Kumarkhera in Narendra Nagar township of Tehri Garhwal district, Uttarakhand, India

Geology
The extension of Krol-Chandpur Nappe of Himanchal Pradesh is found in Narendra
Nagar, Mussoorie and Nainital synclines occurring in one continuous belt. Narendra
Nagar syncline is en echelon to the Mussoorie syncline with an intervening antiform in
the core of which the underlying rocks are seen as a “window”. The Narendra Nagar
syncline is highly compressed in the vicinity of Narendra Nagar town (Raina, 1978).
The rocks constituting this area are those of Krol formation. According to Valdiya
(1980) the Krol formation comprises alternating limestone and green slates in the lower
part and thinly bedded purple and maroon shale with subordinate bands of dolomite in
the middle part. However upper Krol comprises grey and blue limestone and lenses of
flat pebble conglomerate.
Geomorphology
The geomorphic setup of Kumarkhera and surrounding area is defined by highly
dissected denudo-structural hills that have witnessed large-scale gravity transport in
the past. The present landscape of the area has been shaped by denudation of hills and
large-scale gravity transport in the past. The first and second order streams (nalas) are
Disaster
management
strategy
363
Plate 5.
A field view of
overloading of subsidence
prone hill slope of
Kumarkhera due to
ill-conceived construction
of two to three storied
houses in the toe portion of
an old landslide. Some
small active slide scarps
are also seen in the
immediate upslope of
habitation