किस प्रकार की जलधारा (stream) में जलधारा का तल (bed) समीपवर्ती जलभृत (aquifer) के जलस्तर (water table) से लगातार नीचे होता है, जिससे इसे पूरे वर्ष भूजल प्राप्त होता रहता है?

Consider the following statements regarding drainage basin hydrology: A short duration leptokurtic storm hydrograph is produced at the outlet of a drainage basin when: 1. The shape of the basin is circular. 2. The intensity of rainfall is very high. 3. The average slope is low. 4. The drainage density is high. Which of the statements given above are correct?

Total runoff from a catchment area consists of: