We will have an absolute maximum (or minimum) at provided f(c) is the largest (or smallest) value that the function will ever take on the domain that we are working on. Also, when we say the âdomain we are working onâ this simply means the range of xâs that we have chosen to work with for a given problem.
Thompson's slope is about one percent, so each structure manages a zone of about nine acres. At $500 to $2,000 per structure, the drainage water management structures only added about five to 15 percent to the cost of upgrading the field's century-old drainage system.t $500 to $2,000 per structure, the drainage water management structures only added about five to 15 percent to the cost of upgrading the field's century-old drainage system.
As shown in Figure 8, a drainage system has three components: . A field drainage system, which prevents ponding water on the field and/or controls the. water table. . A main drainage system, which conveys the water away from the farm. . An outlet, which is the point where the drainage water is led out of the area. The field drainage system is a network that gathers the excess water from the land by. means of field drains, possibly supplemented by measures to promote the flow of water to. these drains.