{"id":542,"date":"2025-04-11T01:41:41","date_gmt":"2025-04-11T01:41:41","guid":{"rendered":"https:\/\/dudhkoshistorage.org.np\/?page_id=542"},"modified":"2025-06-29T09:31:52","modified_gmt":"2025-06-29T09:31:52","slug":"salient-features","status":"publish","type":"page","link":"https:\/\/dkjvcl.org.np\/ne\/project\/salient-features\/","title":{"rendered":"\u092a\u0930\u093f\u092f\u094b\u091c\u0928\u093e\u0915\u093e \u092e\u0941\u0916\u094d\u092f \u0935\u093f\u0936\u0947\u0937\u0924\u093e\u0939\u0930\u0942"},"content":{"rendered":"

\u092a\u094d\u0930\u092e\u0941\u0916 \u092a\u094d\u0930\u093e\u0935\u093f\u0927\u093f\u0915 \u0935\u093f\u0936\u0947\u0937\u0924\u093e\u0939\u0930\u0942\t\nA. \u092e\u0941\u0916\u094d\u092f \u092c\u093e\u0901\u0927 \u0930 \u091c\u0932\u093e\u0936\u092f\t\n\u0935\u093f\u0935\u0930\u0923\t\u0907\u0915\u093e\u0908\/\u092a\u094d\u0930\u0915\u093e\u0930\n\u092c\u093e\u0901\u0927\u0915\u094b \u092a\u094d\u0930\u0915\u093e\u0930\tConcrete Face Rockfill Dam (CFRD)\n\u092c\u093e\u0901\u0927\u0915\u094b \u0909\u091a\u093e\u0907 (\u092b\u093e\u0909\u0928\u094d\u0921\u0947\u0936\u0928\u092e\u093e)\t220 \u092e\u093f.\n\u092c\u093e\u0901\u0927\u0915\u094b \u0906\u092f\u0924\u0928\t26.7 \u092e\u093f\u0932\u093f\u092f\u0928 \u092e\u093f\u00b3\n\u092c\u093e\u0901\u0927 \u0936\u093f\u0916\u0930 \u0938\u094d\u0924\u0930\t648 masl\n\u092a\u0930\u093e\u092a\u0947\u091f \u0935\u093e\u0932 \u0936\u093f\u0916\u0930 \u0938\u094d\u0924\u0930\t649.5 masl\n\u092c\u093e\u0901\u0927 \u0936\u093f\u0916\u0930 \u0932\u092e\u094d\u092c\u093e\u0907\t630 \u092e\u093f.\n\u0905\u0927\u093f\u0915\u0924\u092e \u0938\u093e\u092e\u093e\u0928\u094d\u092f \u091c\u0932 \u0938\u094d\u0924\u0930 (Max. NWL)\t640 masl\n\u0928\u094d\u092f\u0942\u0928\u0924\u092e \u0938\u093e\u092e\u093e\u0928\u094d\u092f \u091c\u0932 \u0938\u094d\u0924\u0930 (Min. NWL)\t530 masl\n\u0915\u0941\u0932 \u092d\u0923\u094d\u0921\u093e\u0930\u0923 \u0915\u094d\u0937\u092e\u0924\u093e\t1581 \u092e\u093f\u0932\u093f\u092f\u0928 \u092e\u093f\u00b3\n\u091c\u0940\u0935\u093f\u0924 \u092d\u0923\u094d\u0921\u093e\u0930\u0923 (Live Storage)\t1342 \u092e\u093f\u0932\u093f\u092f\u0928 \u092e\u093f\u00b3\n\u092e\u0943\u0924 \u092d\u0923\u094d\u0921\u093e\u0930\u0923 (Dead Storage)\t239 \u092e\u093f\u0932\u093f\u092f\u0928 \u092e\u093f\u00b3<\/h2>\n\n\n\n

(A) Dam, Reservoir, Hydrology, Sedimentology, Spillways, Diversion and Outlet Structures<\/strong><\/h3>\n\n\n\n
Type of Dam<\/td>Concrete Face Rockfill Dam (CFRD)<\/td><\/tr>
Dam Height (on foundation)<\/td>220 m<\/td><\/tr>
Dam Body Volume<\/td>26.7 Mm\u00b3<\/td><\/tr>
Dam Crest Elevation<\/td>648.0 masl<\/td><\/tr>
Parapet Wall Top Elevation<\/td>649.5 masl<\/td><\/tr>
Dam Crest Length<\/td>630.0 m<\/td><\/tr>
Maximum Normal Water Level (Max. NWL)<\/td>640.0 masl<\/td><\/tr>
Minimum Normal Water Level (Min. NWL)<\/td>530.0 masl<\/td><\/tr>
Total Storage Capacity<\/td>1,581 Mm\u00b3<\/td><\/tr>
Live Storage<\/td>1,342 Mm\u00b3<\/td><\/tr>
Dead Storage<\/td>239 Mm\u00b3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

B. Hydrology<\/h4>\n\n\n\n
Catchment Area (at dam site)<\/td>3,857 km\u00b2<\/td><\/tr>
Dudhkoshi River Average Flow<\/td>209 m\u00b3\/s<\/td><\/tr>
Construction Flood (50-year return period)<\/td>3,892 m\u00b3\/s<\/td><\/tr>
Design Flood (10,000-year return period)<\/td>9,027 m\u00b3\/s<\/td><\/tr>
Probable Maximum Flood (PMF)<\/td>12,638 m\u00b3\/s<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

C. Sedimentology<\/h4>\n\n\n\n
Total Sediment Annual Yield<\/td>8.82 Mm\u00b3\/year (15 Mt\/year)<\/td><\/tr>
Total Sediment Volume after 50 years<\/td>441 Mm\u00b3<\/td><\/tr>
Dead Storage Loss after 50 years<\/td>239 Mm\u00b3 (100%)<\/td><\/tr>
Active Storage Loss after 50 years<\/td>202 Mm\u00b3 (15%)<\/td><\/tr>
Average Annual Energy with Sedimentation (50 years)<\/td>3,331 GWh<\/td><\/tr>
Average Dry Season Energy with Sedimentation (50 years)<\/td>1,204 GWh<\/td><\/tr>
Average Wet Season Energy with Sedimentation (50 years)<\/td>2,127 GWh<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

D. Main Spillway<\/h4>\n\n\n\n

(i) Gated Spillway<\/strong><\/p>\n\n\n\n

Type<\/td>Concrete gated<\/td><\/tr>
Design Discharge (10,000 year return period)<\/td>9,027 m\u00b3\/s<\/td><\/tr>
Sill Elevation<\/td>624.0 masl<\/td><\/tr>
Crest Length<\/td>60.0 m<\/td><\/tr>
Radial Gates<\/td>4 nos, 15.0 m x 20.6 m (width x height)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

(ii) Labyrinth Weir<\/strong><\/p>\n\n\n\n

Type<\/td>Labyrinth Overflow<\/td><\/tr>
Design Discharge<\/td>2,250 m\u00b3\/s<\/td><\/tr>
Crest Elevation<\/td>640.5 masl<\/td><\/tr>
Length<\/td>56.55 m<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

(e) Auxiliary\/Emergency Spillway<\/h4>\n\n\n\n
(i) Labyrinth Weir<\/th><\/tr>
Type<\/td>Labyrinth Overflow<\/td><\/tr>
Design Discharge<\/td>3,700 m\u00b3\/s<\/td><\/tr>
Crest Elevation<\/td>644.0 masl<\/td><\/tr>
Length<\/td>154.5 m<\/td><\/tr>
(ii) Embankment Dam<\/th><\/tr>
Type<\/td>Embankment Fuse Dam<\/td><\/tr>
Design Discharge<\/td>7,800 m\u00b3\/s<\/td><\/tr>
Crest Elevation<\/td>647.3 masl<\/td><\/tr>
Bottom Elevation<\/td>637.0 masl<\/td><\/tr>
Length<\/td>154.5 m<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

F. Diversion Tunnels (DT)<\/strong><\/h4>\n\n\n\n
Type and Number<\/td>Horseshoe-shaped, 2 nos<\/td><\/tr>
Diameter (Excavation)<\/td>13.9 m (Finished Dia. 12 m)<\/td><\/tr>
Lengths<\/td>DT1 = 1,115.2 m
DT2 = 1,289.6 m<\/td><\/tr>
Total Design Flow<\/td>3,892 m\u00b3\/s (50-year return period)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
G. Bottom Outlet (BO)<\/th><\/tr>
Type and Number<\/td>Horseshoe-shaped, 1 no
(one of the Diversion Tunnels will serve as BO during operation)<\/td><\/tr>
Diameter (Excavation)<\/td>13.9 m<\/td><\/tr>
Maximum Discharge<\/td>2,400 m\u00b3\/s (120 m gross head)<\/td><\/tr>
H. Low Level Outlet (LLO)<\/th><\/tr>
Type and Number<\/td>Horseshoe-shaped, 1 no<\/td><\/tr>
Diameter (Excavation)<\/td>9.6 m<\/td><\/tr>
Length<\/td>929.3 m<\/td><\/tr>
Maximum Discharge<\/td>1,000 m\u00b3\/s (120 m gross head)<\/td><\/tr>
I. Middle Level Outlet (MLO)<\/th><\/tr>
Type and Number<\/td>Horseshoe-shaped, 1 no<\/td><\/tr>
Diameter (Excavation)<\/td>10.5 m and 13.2 m<\/td><\/tr>
Length<\/td>695.0 m<\/td><\/tr>
Maximum Discharge<\/td>1,000 m\u00b3\/s (90 m gross head)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

(B) Main Powerhouse<\/strong><\/h2>\n\n\n\n
(a) Headrace Tunnel<\/th><\/tr>
Type<\/td>Circular shaped Concrete Lined<\/td><\/tr>
Diameter (Excavation)<\/td>9.32 m (with TBM), Finished Dia. 8.3 m<\/td><\/tr>
Length<\/td>13.2 km<\/td><\/tr>
Design Discharge at Rated Head<\/td>224.4 m\u00b3\/s<\/td><\/tr>
(b) Surge Shaft<\/th><\/tr>
Type and Number<\/td>Circular, 1 no<\/td><\/tr>
Diameter (Excavation)<\/td>20 m<\/td><\/tr>
Height<\/td>221 m<\/td><\/tr>
(c) Steel Penstock<\/th><\/tr>
Type and Number<\/td>Circular, 1 no<\/td><\/tr>
Diameter (Internal)<\/td>6.7 m (3.2 m Dia. in bifurcation)<\/td><\/tr>
Length<\/td>528.0 m<\/td><\/tr>
(d) Vertical Penstock Shaft<\/th><\/tr>
Type and Number<\/td>Circular, 1 no<\/td><\/tr>
Diameter (Excavation)<\/td>8.5 m<\/td><\/tr>
Length<\/td>180.0 m<\/td><\/tr>
(e) Powerhouse<\/th><\/tr>
Type<\/td>Underground Powerhouse<\/td><\/tr>
Capacity<\/td>600 MW (4 x 150 MW)<\/td><\/tr>
Turbine<\/td>Francis (Vertical Axis)<\/td><\/tr>
Turbine Rated Head<\/td>294 m<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

(C) Dam Toe Powerhouse<\/strong><\/h2>\n\n\n\n
(a) Headrace Tunnel<\/th><\/tr>
Type<\/td>D-Shaped, Concrete Lined<\/td><\/tr>
Diameter (Excavation)<\/td>8.0 m x 8.0 m<\/td><\/tr>
Length<\/td>880 m<\/td><\/tr>
Design Discharge at Rated Head<\/td>40 m\u00b3\/s<\/td><\/tr>
(b) Surge Shaft<\/th><\/tr>
Number<\/td>Circular, 1 no<\/td><\/tr>
Diameter<\/td>7.0 m<\/td><\/tr>
Height<\/td>140.15 m<\/td><\/tr>
(c) Steel Penstock<\/th><\/tr>
Type and Number<\/td>Circular, 1 no<\/td><\/tr>
Diameter (Internal)<\/td>2.8 m<\/td><\/tr>
Length<\/td>186.5 m<\/td><\/tr>
(d) Vertical Penstock Shaft<\/th><\/tr>
Type and Number<\/td>Circular, 1 no<\/td><\/tr>
Diameter (Excavation)<\/td>3.6 m<\/td><\/tr>
Length<\/td>82.5 m<\/td><\/tr>
(e) Powerhouse<\/th><\/tr>
Type<\/td>Underground<\/td><\/tr>
Capacity<\/td>70 MW (2 x 35 MW)<\/td><\/tr>
Turbine<\/td>Francis (Vertical Axis)<\/td><\/tr>
Turbine Rated Head<\/td>182 m<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

C. Dam Toe Powerhouse<\/strong><\/h2>\n\n\n\n
(a) Headrace Tunnel<\/th><\/tr>
Type<\/td>D-Shaped, Concrete Lined<\/td><\/tr>
Diameter (Excavation)<\/td>8.0 m x 8.0 m<\/td><\/tr>
Length<\/td>880 m<\/td><\/tr>
Design Discharge at Rated Head<\/td>40 m\u00b3\/s<\/td><\/tr>
(b) Surge Shaft<\/th><\/tr>
Number<\/td>Circular, 1 no<\/td><\/tr>
Diameter<\/td>7.0 m<\/td><\/tr>
Height<\/td>140.15 m<\/td><\/tr>
(c) Steel Penstock<\/th><\/tr>
Type and Number<\/td>Circular, 1 no<\/td><\/tr>
Diameter (Internal)<\/td>2.8 m<\/td><\/tr>
Length<\/td>186.5 m<\/td><\/tr>
(d) Vertical Penstock Shaft<\/th><\/tr>
Type and Number<\/td>Circular, 1 no<\/td><\/tr>
Diameter (Excavation)<\/td>3.6 m<\/td><\/tr>
Length<\/td>82.5 m<\/td><\/tr>
(e) Powerhouse<\/th><\/tr>
Type<\/td>Underground<\/td><\/tr>
Capacity<\/td>70 MW (2 x 35 MW)<\/td><\/tr>
Turbine<\/td>Francis (Vertical Axis)<\/td><\/tr>
Turbine Rated Head<\/td>182 m<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

(D) Transmission Line and Sub-Stations<\/strong><\/h2>\n\n\n\n
(a) Transmission Lines<\/th><\/tr>
Type and Voltage<\/td>Double Circuit, 400 kV<\/td><\/tr>
Conductor<\/td>ACSR Moose (Quad bundle per phase)<\/td><\/tr>
Length from Main Powerhouse substation (Dhitung Substation) to Dhalkebar substation<\/td>82 km<\/td><\/tr>
Length from Dam Toe substation to Bhadaure substation – LILO<\/td>1.6 km<\/td><\/tr>
(b) Substation \/ Switchyard<\/th><\/tr>
Number<\/td>3 nos<\/td><\/tr>
Location<\/td>One next to Main Powerhouse and the other two are located next to Dam Toe Powerhouse<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

(E) Energy and Implementation Plan<\/strong><\/h2>\n\n\n\n
(a) Energy Production<\/th><\/tr>
Average Annual Energy Production<\/td>3,377 GWh<\/td><\/tr>
Average Dry Season Energy Production<\/td>1,252 GWh<\/td><\/tr>
Average Wet Season Energy Production<\/td>2,125 GWh<\/td><\/tr>
(b) Project Implementation<\/th><\/tr>
Construction Period<\/td>7 years<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

<\/p>","protected":false},"excerpt":{"rendered":"

A. Main Dam and Reservoir (A) Dam, Reservoir, Hydrology, Sedimentology, Spillways, Diversion and Outlet Structures Type of Dam Concrete Face Rockfill Dam (CFRD) Dam Height (on foundation) 220 m Dam Body Volume 26.7 Mm\u00b3 Dam Crest Elevation 648.0 masl Parapet Wall Top Elevation 649.5 masl Dam Crest Length 630.0 m Maximum Normal Water Level (Max. […]<\/p>","protected":false},"author":1,"featured_media":486,"parent":59,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-542","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/pages\/542","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/comments?post=542"}],"version-history":[{"count":19,"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/pages\/542\/revisions"}],"predecessor-version":[{"id":866,"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/pages\/542\/revisions\/866"}],"up":[{"embeddable":true,"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/pages\/59"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/media\/486"}],"wp:attachment":[{"href":"https:\/\/dkjvcl.org.np\/ne\/wp-json\/wp\/v2\/media?parent=542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}