STUDY THE EFFECT OF LAND SLOPES ON RUNOFF AND SEDIMENT YIELD FROM CASHEW PLOT OF PRIYADARSHINI WATERSHED

K.D. GHARDE¹*, A.P. SURVEY², Z.S. THAKUR³, S.S. IDATE^4
1Department of Soil and Water Conservation Engineering, College of Agriculture Engineering & Technology, Dr Balasaheb Sawant Konkan Krishi Vidyapeeth, Dapoli, 415712, Ratnagiri, India
²Department of Soil and Water Conservation Engineering, College of Agriculture Engineering & Technology, Dr Balasaheb Sawant Konkan Krishi Vidyapeeth, Dapoli, 415712, Ratnagiri, India
³Department of Soil and Water Conservation Engineering, College of Agriculture Engineering & Technology, Dr Balasaheb Sawant Konkan Krishi Vidyapeeth, Dapoli, 415712, Ratnagiri, India
⁴Department of Soil and Water Conservation Engineering, College of Agriculture Engineering & Technology, Dr Balasaheb Sawant Konkan Krishi Vidyapeeth, Dapoli, 415712, Ratnagiri, India
* Corresponding Author : ghardek@rediffmail.com

Received : 01-05-2022     Accepted : 27-05-2022     Published : 30-05-2022
Volume : 14     Issue : 5       Pages : 11285 - 11289
Int J Agr Sci 14.5 (2022):11285-11289

Keywords : Runoff, Sediment, Rainfall, Water and soil
Academic Editor : Oluk Aylin C., Dr Vijaya Lakshmi V, Girja Shanker Tewari
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Department of Soil and Water Conservation Engineering, College of Agriculture Engineering & Technology, Dr. Balasaheb Sawant Konkan Krishi Vidyapeeth, Dapoli, 415712, Ratnagiri, India
Author Contribution : All authors equally contributed

Hydrologic behavior of watershed is very important in designing hydraulic, water harvesting structures. This relates with the runoff potential and sedimentation form the catchments from different slope and vegetation cover. Konkan region is receiving heavy rainfall caused heavy sediment yield. In present study try to identify the different slop without any vegetation exaggerates the runoff and sediment. Three slopes such as 8 per cent, 12 per cent and 20 percent slope were used to measured runoff and sediment yield because such slope is common the Konkan region. The runoff and sediment yield were collected in Tank of size 5 m length 1 m wide and 0.6 m depth i.e., total volume of 3000 litre from plot sizes of 15m length 5 m width i.e., area of 75 sq m. The tank was covered to avoid the direct rainfall accumulated in the tank and error may occur in runoff measurement. Shape of plot make by smoothening surface. The runoff was recorded at morning 8.30 am IST and Sediment sampling done by collecting 1 litre bottle of well stir water sample and compute sediment by filter paper methods. The Texture analysis of collected sample was done to compute the particle distribution in the collected samples. It is observed that, the rainfall amount increase on daily basis runoff also increases and it is related with the AMC condition also. The total rainfall observed for years 2016 during July to September causing rainfall was 2424.5 mm. The percent runoff observed from 8 per cent, 12 per cent and 20 per cent plot was 44.10 (1069.27 mm) per cent, 42.96per cent (1041.63 m) and 42.43 per cent (649.22 mm) respectively during rainy months. The average sediment yield observed from three plots was 32.90t/ha/years, 34.52.t.ha.yr and 30.56 t/ha/yr for 8 per cent, 12 per cent and 20 per cent, respectively. The particle size collected in the sediment was sand more found compared to the other particles. It is observed that the per cent of slop not dominantly affect the runoff but the vegetation cover most predominately affect the runoff and sediment

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