BEHAVIOUR OF AGRICULTURE MICRO- WATERSHED IN SEMI- ARID TRACT OF KOTA REGION

Abstract

AT KOTA AN H- FLUME AND RUNOFF SAMPLER WITH WATER STAGE RECORDER WAS INSTALLED IN 1974 ON AN AGRICULTURAL MICRO- WATERSHED OF 0.4 HA AREA TO FIND OUT PEAK AND TOTAL RUNOFF , SOIL LOSS VIS- A VIS CROP GROWTH. AVERAGE ANNUAL RUNOFF AND SOIL LOSS WERE 16 cm AND 3.44 TONNES/HA RESPECTIVELY. THE VALUEOF 'C' IN RAMSER'S RATIONAL FORMULA WAS FOUND TO BE AS HIGH AS 0.8 FOR INDIVIDUAL STORMS WHEN ' ANTECEDENT MOISTURE CONDITION' (AMC) WAS GROUP III. WITH ALMOST SAME AMOUNT OF RAINFALL RECEIVED ON AN AVERAGE IN JULY AND AUGUST, JULY RECORDED 44.7% OF TOTAL RUNOFF AND 77.9% OF TOTAL SOIL LOSS AGAINST 49% RUNOFF AND 20.1% OF TOTAL SOIL LOSS IN AUGUST. EVAPOTRANSPIRATION (ET) OF JAI- JOWAR+ ARHAR (LOCAL) MIXTURE WAS 59.8 AND 70.0 CM TILL HARVEST OF JOWAR AND ARHAR, RESPECTIVELY. ET FOR SAME PERIOD FOR CSH-5 JOWAR+ARHAR WAS 49.5 AND 56.9 cm RESPECTIVELY