Abrupt changing the channel bed elevation in hydraulic systems due to e.g. chutes, drops and steeped spillways, tends to create a sever flow kinematic energy. This excess energy results different unfavorable phenomena including tremendous forces on hydraulic structures, scouring and degrading the channel bed which results to destruction of the downstream structures. These phenomena would intensify while a number of vertical drops constructed consecutively along the channel. The main goal of the present study is to explore methods for increasing the energy dissipation efficiency of vertical drops by installing new types of dissipaters namely Grating and Netting dissipaters based on model experimentation. These types of dissipaters could be established over the drop crest looking like a bottom racks. In addition, the features of hydraulic jump created in the stilling basins of these types of vertical drops, are compared with those of a simple vertical drop. By assembling the above mentioned structures over the stilling basins of vertical drops, the jet flow direction is changed the degree of turbulence is increased that tend to increase the head loss. In addition, the length of the hydraulic jump decreases. Both these consequences enhance the stilling basin efficiency and are of interest in practice. The enhanced efficiency of the proposed structures was quantified based on the achieved experimental data. Both analytical and experimental investigations were performed in the present study. Experiments were conducted based on three different drop heights, five different netting dissipaters with certain grid’s dimension and three different grating dissipaters with special slot widths. The range of Y c / h ratios (where Y c is the critical depth and h is the vertical drop height) was considered between 0.14 and 0.325. Based on the model experimentation data, empirical equations were presented to estimate the depth and length of the pool downstream of the drop, the force acting on the basin floor, optimum length of the dissipaters and relative head loss. With respect to the results of the former investigations and their assumptions new semi-analytical models were developed for estimating the above mentioned hydraulic parameters of the vertical drops which were equipped by netting or grating dissipaters. To expand the present semi-analytical model more logical assumptions were applied and data of the present model experimentation were used. The proposed semi-analytical model compared well with the experimental results. However there are small discrepancies between the analytical and experimental results of netting dissipaters. This is partly due to the flow high turbulence and complicated phenomena exist in the stilling basins of netting dissipaters. Also, the air bubble entrainment is another source of the difference between the two sets of results. Overall, installing grating dissipaters increases the head loss efficiency by up to 30% and decreases the hydraulic jump length by about 30-35% compared with simple vertical drops. However, for the netting dissipaters the head loss increases by up to 45% and the jump length decreases by about 60-75%. Keywords: Energy Dissipater, Hydraulic Jump, Netting, Grating, Vertical Drop