For the attached stream hydrograph from the vermilion, answer a & b recession equation below a) calculate the recession constant (-a) using the baseflow flow at some time " after recession has started, usually until normal flow is achieved where: qthe q.-the flow at the start of the recession a a recession constant for the basin t the time since recession has started recharge (v using the formula given below from your b) calculate the total potential ground water vernilion r surrey st. e lafayette, la station nunber: