Complex sentence: Waste stabilization ponds are usually considered a cheap alternative in terms of construction costs, but the final costs will depend essentially on the size of ponds, presence of maturation ponds in the flowsheet, topography, soil conditions, groundwater level and land cost.
Split into simpler sentences: Waste stabilization ponds are usually considered a cheap alternative in terms of construction costs. However, the final costs will depend essentially on the size of ponds, presence of maturation ponds in the process configuration, topography, soil conditions, groundwater level and land cost.