Champagne grapes (France) ripen early because of global warming, while the Mekong Delta has to adapt to drought and salinity.
This year's grape harvest ceremony (vendange) in the Champagne region (France) begins on August 12, the earliest in history. Some gardens pick from August 6 because the heat causes sugar to increase and acid to decrease. In fact, in just the past 50 years, the French grape season has arrived nearly a month earlier than traditional history.
A centuries-old luxury industry is learning a rather popular lesson: you can't dictate the weather.
Vietnam has learned this lesson in a more expensive way. In the 2015-2016 dry season, drought and salinity affected about 405,000 hectares of crops in the Mekong Delta, and 210,000 households had problems with drinking water. The reaction at that time was quite natural: If it was salty, block it, if it was lacking in sweetness, keep it. Dykes, culverts, canals, and dams are of course necessary.
But reality gradually shows an unpleasant thing: closing a sewer sometimes blocks an entire ecosystem. Ba Lai in Ben Tre is an example. The project helps store fresh water but also changes flow, sedimentation, water quality and creates conflicts between people who need fresh water for farming and people who need brackish water for aquaculture.
U Minh shows another type of intervention. Retaining water to prevent melaleuca forest fires is necessary, but maintaining water levels that do not match natural cycles can also disturb peatlands and ecosystems that operate seasonally.
It's not necessarily that the project is wrong. Maybe the original human question was too simple, while nature's answer was more complex than the data. If salt water is still coming in, instead of just asking "how to stop it?", the additional question needs to be asked before taking any action "how can we live with it?".
The 2019-2020 dry season gives a suggestion. Salinity comes early and deeply, in some places the boundary of 4 grams/liter exceeds 80 km. But the damaged rice area is only about 29,700 hectares, much lower than the 2015-2016 season.
Partly because farmers sow seeds early, move crops and actively do not sow in places where there is definitely a lack of water. Salt water is not gentler, but the response is more flexible.
But we can't be too happy yet, because the Mekong itself is changing. Saying that upstream hydropower only "blocks water loss" is not accurate. The reservoir can also supplement dry season flow at some times. The bigger problem is that they change the rhythm of the river and trap sediment.
A study of 55 years of data estimates that upstream dam development has reduced the amount of sediment reaching the Vietnamese Delta by 74.1%. If you wait until all impacts are fully measured before preparing a response plan, it may be too late.
Therefore, climate adaptation cannot be just an environmental slogan. It must go into very specific calculations about economics, engineering and understanding the ecosystem.
In Ca Mau, in the rainy season, rice is grown, and in the dry season, salt water is used for shrimp farming. The two subjects shared a field, instead of being forced to serve one rice crop all year. Therefore, the rice-shrimp area has gradually increased over the years. In the saline region of Bac Lieu, Artemia - a small crustacean used as food for shrimp and fish fingerlings - becomes a commodity. In 2025, a cooperative chain sells eggs for about 1.1 million VND/kg, and associated households are reported to have a profit of about 50 million VND/ha. What rice doesn't like, Artemia is quite happy about.
Mangrove forests can also be viewed in another way: wave blocking, land preservation, shrimp and crab farming under canopy, tourism. "Thuan Thien" does not mean that nature gives you whatever you want.
It's not like every time it's salty, you release shrimp, or every time it gets hot, you open a resort. Where dikes are needed, there must still be dikes. Where sewers are needed, there must still be sewers. But construction should protect people and property, not necessarily protect at all costs a production model that is no longer suitable for new conditions.
The question therefore needs to shift from how to keep things the same? With new conditions, what creates the best value? Brackish water can raise shrimp, crabs, and Artemia. Mangrove forests can both protect banks and create livelihoods and tourism. Rice fields can have their crop reduced or their schedule changed.
Of course, not every conversion is successful. Adaptation does not turn climate change into good news. It just helps lower the bill that we and future generations have to pay.
Nature will continue to change, perhaps more dramatically than we would like. Humans do not determine the salinity of the sea, the amount of rain on the Mekong or the date grapes ripen in the Champagne region.
But we can decide what varieties to plant, what animals to raise, where to invest money, and when to stop keeping the old way of doing things. Power does not lie in the ability to isolate nature. But in the ability to understand it deeply enough to know how to change.
