B. Hydrogeomorphology:

Information on landforms is an important input for land management and soil mapping. The aspects of morphology, morphogenesis, morpho chronology and morphometry are vital inputs in preparation of geomorphologic maps.

The geomorphic units are delineated based on image characteristics like tone, texture, shape, colour, associations etc. ( Fig.5.2 A).

C. Slope:

Information on slope is vital for suggesting actions related to restoration plans of landscape. This information is usefull for suggesting checking of soil erosion and drainage related measures. The slope map has been prepared as per IMSD guidelines.

Using this information Digital elevation model has been generated using 20 metre contour interval.

D. Drainage / Watershed:

A drainage map of the study area was prepared using satellite data in conjunction with SOI topography maps. Most of the streams originate from the hill ranges to the west of the lake and discharge water directly into Loktak Lake. Some of the major streams include Nambul, Nambol, Thongjaorok, Awang Kujairok.

Awang Kharok, Ningthoukhong, Potsangba, Oinam, Keinau and Irulok contributing significant silt during rainy season to the lake. In all 12 micro-watershed were demarcated and they have been given nomenclature according to the standard of All India Soil and Land Use Surveys (AIS & LUS) of the Ministry of Agriculture. ( Fig. 5.2 B)

E. Road Network & Settlements:

The road transport network is one of the major criteria for studying and analyzing the socio-economic problem of a certain area and for assessment of impact on the wetland. In the present study, there are three types of roads classified as National highway, Village road and other which may include footpaths etc.

The total length of National Highway is 59.652, village road is 723.243 km and others are 234.5 km. (Fig. 5.2.C)

Fig. 5.2A Various Thematic maps of Loktak Catchment Area Click here for a higher resolution picture

Fig. 5.2B Various Thematic maps of Loktak Catchment Area Click here for a higher resolution picture

Fig. 5.2C Various Thematic maps of Loktak Catchment Area Click here for a higher resolution picture

Fig. 5.2D Various Thematic maps of Loktak Catchment Area Click here for a higher resolution picture