Relief (shape Gentle slopes of the land) Steep slopes Land use More urban areas (more urban (tarmac) areas) More rural areas (trees/grass) Complete this key and colour in each factor in the table above: Physical factor Human factor Complete the table below: Factor Drainage Reduces Explanation – how this factor reduces the lag basin/precipitation or time characteristic increase Hint: use key terms infiltration and surface the lag run off time? Basin size Small Large Drainage Low (few tributaries) density High (many tributaries) Soil moisture Saturated soil Dry soil
Relief (shape of the land) Gentle slopes Steep slopes Land use (more urban areas) More urban areas (tarmac) More rural areas (trees/grass) Complete this key and colour in each factor in the table above: Physical factor Human factor Complete the table below: Factor Drainage basin/precipitation characteristic Reduces or increase the lag time? Explanation – how this factor reduces the lag time Hint: use key terms infiltration and surface run off Basin size Small Large Drainage density Low (few tributaries) High (many tributaries) Soil moisture Saturated soil Dry soil
Revision_3_Hydrographs.docx