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 | | Lingqu Canal, also named Xianggui Canal, Xing'an Canal, and Douhe River, runs between 111°41' east longitude and 25°36' north latitude, on Haiyang river by the side of Nandoukou 3 kilometers away from Xing'an county seat. |
 | | The headworks actually serve as dams to maintain balance of the water allocation between the two Canals, that is, to control less water inlet in Nanqu Canal and more water inlet in Beiqu Canal, and to produce 3:7 proportion of splitflow under given conditions. |
 | | Nanqu Canal, 33.15 kilometers in total length, 7 to 12 meters in width, and 0.3 to 1.3 meters in depth, starts at Nandou and ends at the outlet of Linghe River, Having an effective irrigation area of 2540 ha. |
| www.icold-cigb.org.cn /icold2000/st-c4-02.html (670 words) |
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