GIS Application in Mapping and Development of Trout Fisheries Resources along Yargyap Chu Drainage in Eastern Himalayas

A study was carried out by using Geo-informatics on the basic morphometry of the aquatic resources of Shi Yomi district of Arunachal Pradesh in the Eastern Himalayas with an objective to develop strategic plans for trout fisheries development along the drainage system of river Yargyapchuat Menchukha circle. The river Yargyapchu flows a distance of 53 km and have a stream frequency of fourth order. The upland lake resources accounts 6 in numbers and covers an area of 39.15ha. Eight categories of Land Use Land Cover (LULC) were classified for the Menchukha circle where the major percentage of land is covered by forest (80percent) followed by snow area (10percent), wasteland (9percent) and agricultural land (1percent). The slope class developed from Digital Elevation Model (DEM) shows 41percentof the total geographic area was within 0–21 degree slope, 50percent area in 21–35 degree slope and 9percent area within 36–78 degree slope. Furthermore, the elevation class up to 2000m MSL and above encompasses 76percent and 24percent of the total geographic area respectively. These selected input feature classes were superimposed in the spatial analyst ArcGIS v 10.7 to determine 27.84 ha in the slope range of 0–10 degreeas highly suitable and 22.34 ha in the slope range of 10–20 degree as moderately suitablefor trout fish farmingin the Menchukha circle of Shi Yomi district.