● WRITE NAMES OF DIFFERENT WATER RESOURCES PRESENT IN SIKKIM
● COLLECT DATA OF AQI (AIR QUALITY INDEX) OF DELHI AND SIKKIM OF 10 CONSECUTIVE DAYS (PM2.5 AND PM10 ONLY) MAKE A GRAPH AND COMPARE THE AIR OF DELHI AND SIKKIM FOR THESE 10 DAYS.
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WATER RESOURCES
In Sikkim, the role of water resources in the environment is paramount. It is recognized that water is
a scarce and precious natural resource to be planned, developed and conserved in an integrated and
environmentally sound basis. In doing so, the preservation of the quality of environment and the ecological
balance are also of prime consideration. The Teesta is the major river system in the state.
THE TEESTA and ITS TRIBUTARIES
Teesta river originates as Chhombo Chhu from a glacial lake Khangchung Chho at an elevation of
5,280 m in the northeastern corner of the state. The glacial lake lies at the snout of the Teesta Khangse
glacier descending from Pauhunri peak (7,056 m) in north western direction. Teesta Khangse glacier and
Chho Lhamo are also considered as the source of Teesta river by many authors. Along its traverse from its
origin to the plains, the river receives drainage from a number of tributaries on either side of its course. The
tributaries on the eastern flank are shorter in course but larger in number whereas the tributaries on the
western flank are much longer with larger drainage areas, consequently contributing much more amount of
discharge to the main Teesta river. Furthermore, right-bank tributaries drain heavily glaciated areas with
large snow-fields. The left bank tributaries, on the other hand, originate from semi-permanent and much
smaller snow-fields as compared to right bank tributaries.
The major tributaries of Teesta river are listed below. For better understanding of Teesta river
system, it has been divided into a number of river sub-systems which are described in the succeeding
paragraphs. These sub-systems are: i) Chhombo Chhu/ Teesta river upstream of Zemu Chhu-Teesta
confluence, ii) Zemu Chhu, iii) Teesta river between Lachen and Chungthang, iv) Lachung Chhu, v)
Chungthang-Mangan and Chakung Chhu sub-system, vi) Rangyong (Talung) Chhu, vii) Dik Chhu, viii)
Teesta river between Mangan and Singtam, ix) Rani Khola, x) Teesta river between Teesta-Rani Khola
confluence and Teesta-Rangpo Chhu confluence, xi) Rangpo Chhu, xii) Rangit River, and xiii) Jaldhaka
River.
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