Enhancing the efficiency of irrigation systems

Phuoc Hoa irrigation canal system

Notable among them is Dau Tieng Reservoir, a particularly important irrigation work associated with national security, as designated under Decision No. 1502 dated December 2, 2024, and included in the list of special-category dams and irrigation reservoirs under Decision No. 124 dated January 24, 2019, issued by the Prime Minister. With a total capacity of up to 1.58 billion cubic meters, the reservoir not only ensures a stable water supply for agricultural irrigation but also serves industrial activities, daily life, and other services across three localities: Tay Ninh, Dong Nai, and Ho Chi Minh City.

To effectively utilize the water resources from Dau Tieng Reservoir, a synchronized irrigation canal system has been developed, consisting of two main channels with a total length of 73.675 km. This system currently supplies water to 33,530 hectares/47,874 hectares of the designed irrigation area, reaching 70.01% of its capacity. Of these, the Western Main Canal is 38.975 km long, with a designed flow rate of 93 m³/s, providing irrigation for 17,430 hectares/ 22,000 hectares (79.23%). In addition to irrigation, this canal also supplies industrial and domestic water through Tay Ninh Water Supply and Sewerage JSC, with an output of approximately 20,000 m³/day.

The Eastern Main Canal, measuring 34.7 km in length, has a designed flow capacity of 93 m³/s and currently irrigates 16,100 hectares out of a planned 25,874 hectares (62.22%). In addition, it supplies domestic water at a capacity of up to 150,000 m³/day.

In parallel with the irrigation canal system, the drainage canals have also been systematically developed to ensure effective water discharge. The drainage network consists of four main canals with a total length of 22.087 km, including the Phuoc Hoi – Ben Dinh drainage canal, the canal behind the dry discharge sluice at K1+677 on the Eastern Main Canal, the T3 drainage canal at K13+042 on the Western Main Canal, and the canal downstream of the auxiliary dam. Additionally, a system of dikes has been constructed to protect residential areas. Among these, the Grade-III dike system has a total length of 9.298 m, including a 4.371 m section protecting the former Tan Hung township and a 9.298 m section protecting the former Vinh Hung township.

In addition to the irrigation works managed by the Ministry of Agriculture and Environment, Tay Ninh also operates several important systems under the management of the Provincial People's Committee. Notably, the Tan Hung Main Canal system spans 29.89 km, of which 4.508 km have been reinforced. It has a designed flow rate of 12.8 m³/s and currently irrigates 6,858 hectares/10,701 hectares, achieving 64.09% efficiency. The Tan Bien Main Canal system is 23.018 km long with a designed capacity of 13.5 m³/s; however, its irrigation efficiency remains low, covering only 1,687.77 hectares/6,407 hectares, equivalent to just 16.23%.

In addition, the Duc Hoa irrigation canal system is a large-scale network with a total length of 185.85 km, comprising a main canal of 3.66 km, primary canals of 31.766 km, secondary and intergrade canals of 62.31 km, and tertiary canals and branches totaling 88.11 km. This is a key canal system serving the agricultural–industrial development zone in the southern part of the province.

Notably, the gravity-fed irrigation system serving the sugarcane material zone in Tan Chau effectively supplies water for 2,752.96 ha/crop, reaching 75.01% of the designed area. It also provides industrial water to the Tan Chau starch processing plant operated by Quang Ngai Agricultural and Food Products Joint Stock Company, with a supply capacity of 1,500 m³/day.

Tha La Reservoir, a large-scale storage facility with a capacity of approximately 27.5 million m³, is designed to irrigate 3,670 ha and continues to serve as a strategic water source for the province's western region.

Currently, the entire province has 12 pumping stations and 25 Grade-IV dikes with a total length of 53.651 km, along with a multi-level irrigation canal system consisting of 1,765 canals stretching 1,743.12 km; 196 natural and man-made channels with a combined length of 2,515.106 km; a drainage system of 215 canals totaling 576.146 km; and 43 regulating sluice structures. The irrigation infrastructure has been continuously expanded and upgraded, playing a vital role in regulating and distributing water efficiently, minimizing damage caused by drought and flooding, and creating favorable conditions for the sustainable development of agricultural, industrial, and urban production zones across Tay Ninh province./.

By Le Duc – Translated by Tuong Vinh

Source: https://baolongan.vn/phat-huy-hieu-qua-he-thong-cong-trinh-thuy-loi-a200159.html