Seawalls come in several sizes, from small curb-like lanes to tall concrete barriers. All the sizes serve the same purpose but are designed for vastly different water conditions. With sea-level rise a major concern, along with vastly more severe storms that can whip up waves and cause flooding from storm surges, your seawall design should be designed with those circumstances in mind. Even if your seawall is placed rather far inland, such as in a canal with few giant storm waves, a general increase in water level may still affect your property.
Better Safe Than Sorry
The future regarding climate change and sea-level rise is concerning for many people and businesses. While there are scientific models, you likely don't know what advances in science will allow countries to mitigate the rise, nor do you know if something will happen to speed it up and make it worse. If you add a seawall now, you want that seawall to last as long as possible, and that includes making sure it can handle increased water pressure and associated problems.
Will Higher Seawalls Obscure Views?
There is the potential for higher seawalls if your modified design calls for increasing the height to block views. This does have the potential to affect selling points and curb appeal if you want to sell the property later on. However, the threat of flooding and damage from increased storm surges, for example, would also lower your property value. No matter which option you should choose, at least the modified seawall would offer safety and protection.
Will That Change the Chosen Style?
Seawalls also come in several styles, from living walls to riprap to simple concrete walls. The height that you need the seawall to be at could potentially change the style of seawall you wanted to get. Many people like riprap walls, for example, because these collections of rocks look very natural compared to a blank concrete slab. But it's harder to have a higher riprap wall, and if projections for sea-level increases mean you need to build a very tall seawall, you may not be able to use this particular style.
Speak with design engineers about planning for potential increases in water levels and how much bigger the seawall might need to be if you wanted to account for some of that increase. The added protection will be worth it. For more information, contact a seawall design engineer.