CURRENT STATUS OF LANDSLIDE ON CANALS IN CA MAU PROVINCE AND PROBLEMS THAT NEED TO BE SOLVED

Abstract

Ca Mau province has a very developed canal system, distributed in all districts and cities of this province with a total length of 8,118,815 m, of which level II canals have the largest total length of 3,647,055 m, accounting for 44.9%; level I canals has a total length of 1,816,076 m, accounting for 22.4%. Thoi Binh district has the largest canal length in the province with 1,352,812 m, accounting for 16.7% of the province's canal length. Currently, Ca Mau province has 355 canal sections that are experiencing landslides, most concentrated in Dam Doi district with 120 canal sections, accounting for 33.8%; followed by Nam Can district with 66 canal sections, accounting for 18.6. The total length of river and canal that are experiencing landslides in Ca Mau is 424,659 m, of which the particularly dangerous level is 118,713 m, accounting for 28.0%; The dangerous level is 305,946 m, accounting for 72.0%. Characteristics of canal bank landslide in the Eastern and Western areas of Ca Mau are significantly different. Causes of canal bank landsilde are divided into two groups: i) Group of exogenous factors and ii) Group of endogenous factors. Some proposals that need to be implemented for Ca Mau are: i) Implement the division of canal levels according to Decree 40/2023/ND-CP dated June 27, 2023 of the Government; ii) Assess the ability of coastal mangrove trees to regenerate and recover in association with substrate conditions, tidal regime, silt,... as a basis for developing biological solution to protect canal banks in sustainable way; iii) Summarize and test solution to prevent landslides of canal banks.