The villagers are reinforcing the dyke in preparation for flood defense.
Tips
usage
抗 (resist) pairs with many disasters: 抗旱 kànghàn (resist drought), 抗震 kàngzhèn (resist earthquake), 抗洪 kànghóng (resist flooding). 涝 specifically means waterlogged farmland, so 抗涝 is mostly an agricultural term.
