BEIJING, Nov. 4 -- Four more ancient Chinese irrigation projects have been designated as World Heritage Irrigation Structures (WHIS), the Ministry of Water Resources said on Saturday.

This was according to a list of WHIS for 2023 announced during the 74th International Executive Council Meeting of the International Commission on Irrigation and Drainage (ICID) being held in India.

The inclusion of the Qimenyan Irrigation System, the Hongze Lake Irrigation System, the Huoquan Spring Irrigation System, and the Baini Weirs brought the total number of Chinese irrigation projects on the WHIS list to 34, according to the ministry.

The Qimenyan Irrigation System in east China's Anhui Province was first established in Western Han Dynasty (202 B.C.-25 A.D.). For over 2,000 years, the project has played an important role in irrigation, flood control, and drought prevention. It currently still irrigates about 13,000 hectares of farmland.

The Hongze Lake Irrigation System in eastern Jiangsu Province is a water storage irrigation area. Since the Eastern Han Dynasty (25-220), ancient people have diverted water for irrigation and farming. The irrigation system nowadays keeps irrigating farmland.

The Huoquan Spring Irrigation System in northern Shanxi Province has a history of nearly 1,400 years. The irrigation projects still play a role in irrigation, water supply, ecology, and tourism. The Baini Weirs in central Hubei Province still play a role in irrigation, flood control, drought relief, water supply, and other functions.

Chen Mingzhong, an official with the ministry, said that China is a country with the richest types of irrigation engineering heritage that also boasts the most widespread distribution.

Along with the four Chinese projects, another 15 irrigation projects in countries including India, Indonesia, Iraq, Japan, Thailand, and Türkiye were also added to the ICID's WHIS-2023 list this year. The ICID's WHIS list now covers 159 projects around the world.

Established in 1950, the ICID is an international organization aimed at boosting scientific and technological exchanges on irrigation, drainage, and flood control.

The WHIS designation, established by the ICID in 2014, aims to protect and promote irrigation projects of historical value and scientific experience.

According to a statement on the website of the ICID, nominations are invited from ICID National Committees for the selection of World Heritage Irrigation Structures that include both old operational irrigation structures as well as those having archival value.