Did the 1994 flood (i.e., the highest river level ever recorded here) stay within the floodplain and its bounding valley slopes? Does this suggest the 1994 flood was of normal or abnormal magnitude (severity) for this river? Explain your reasoning.

Answer:

According to the records given in the 'Flood Data Table' the 1994 flood is the highest river level ever recorded in the area and it was confined within the floodplain. This means the 1994 flood was normal. Abnormal floods are those floods that inundate a steep slope.In the map provided point Y on the X-Y line is above the steep slope (above closely packed contours) since the 1994 flood did not reach point Y then according to the geological point of view, the 1994 flood was within the floodplain and hence it is a normal magnitude flood. 

Take a look at the image attached in the explanation section below that demonstrates where the 1994 flood reached.

Step-by-step explanation

The 1994 was the highest flood that was ever recorded in the area and it is a normal flood because it is confined within the flood plain as per the geological point of view.

PFA