SEDIMENTATION DIVISION
---- Joint Hydrographic surveys conducted by the then APERL of United Andhra Pradesh and KERS of Karnataka in Thungabhadra reservoir have benefited the United Andhra Pradesh by 10 TMC of water.
---- The Full Reservoir Level of Nizam Sagar Reservoir was raised by 4.5’ ( from +1400.5’ to 1405.00’ ) to cater to the ayacut demands based on the Hydrographic Surveys conducted by these labs during 1970.
The afforestation programme in the Nizam Sagar catchment was also consequential to the Hydrographic survey of these labs.
REMOTE SENSING LABORATORY
A critical study on Somasila Reservoir by using Visual and Digital Intepretation Techniques was made, for which a Merit Certificate was awarded to this organization in the year 1984.
---- Joint Hydrographic surveys conducted by the then APERL of United Andhra Pradesh and KERS of Karnataka in Thungabhadra reservoir have benefited the United Andhra Pradesh by 10 TMC of water.
---- The Full Reservoir Level of Nizam Sagar Reservoir was raised by 4.5’ ( from +1400.5’ to 1405.00’ ) to cater to the ayacut demands based on the Hydrographic Surveys conducted by these labs during 1970.
The afforestation programme in the Nizam Sagar catchment was also consequential to the Hydrographic survey of these labs.
REMOTE SENSING LABORATORY
A critical study on Somasila Reservoir by using Visual and Digital Intepretation Techniques was made, for which a Merit Certificate was awarded to this organization in the year 1984.
HYDRALULIC LABORATORY
--- ECONOMICAL DESIGN OF ENERGY DISSIPATION FOR NAGARJUNA SAGAR DAM
For NagarjunaSagar Dam, the conventional stilling basin was adopted in original design. Based on model studies this lab has recommended “SKI-JUMP” bucket instead of stilling basin thereby saving of Rs.10,00,000/- in 1960
--- NEW TYPE ENERGY DISSIPATION ARRANGEMENT EVOLVED
A new type of energy dissipation for spillways was evolved based on model experiments. This new type of energy dissipation called as “INTERACTING JET ENERGY DISSIPATION” was adopted for KOILSAGAR project during 1950.
--- A “SIPHON SPILLWAY” was developed by these labs based on model studying for “SARALA SAGAR” Project during 1950
--- Based on the results of model experiments conducted at the then APERL, the Krishna water dispute tribunal during the later half of 1970 awarded 800 TMC of water to the state of AndhraPradesh
--- TIME & MONEY SAVED THROUGH THE USE OF MATHEMATICAL MODELS
Recommendations regarding energy dissipation arrangements have been made to some of the Projects based on Mathematical Models, Dispensing with the necessity of conducting costly and time consuming model experiments. This has resulted in speedy execution of Projects during 1950 to 1970
--- Spraying of “CITYL ALCOHOL” for control of evaporation was advocated by this Organization in 1970 and now being followed by Water Works Department.
ENGINEERING MATERIALS LABORATORY
--- A “SMOKELESS CHELLA” was invented during 1950 and used world wide.
--- A Medal was received from the Central Board of Irrigation and Power for a contribution about the bond between Steel and Concrete that has resulted in considerable savings in the reinforcement to be provided.
--- Mix Designs by absolute volume method was invented due to which about 10 to 15% saving in the Cement Concrete mixes was
achieved.
SOIL MECHANICS LABORATORY
During the past years, many soil samples were tested in the Soil Mechanics Lab among which, a record of 1,205 soil samples were tested in a single year i.e 2018-19 for various ongoing projects like Kaleswaram and PRLIS which were urgent and important.
The soil test results were utilized for formation of embankments of Uddandapur Reservoir, Kurumurthyraya sagar reservoir, Venkatadri Reservoir of PRLIS and also for the formation of Embankments of Sri Komaravelli Mallanna sagar reservoir, Baswapur Reservoir, Kondapochamma reservoir etc. of Kaleswaram project.
The revenue collected towards testing charges and deposited in the PAO(W&P) during the past five years i.e. from 2015-16 to 2019-20 was to the tune of about 1.70 Crores.
In addition to the above works, the Administrative Approval for Rs. 215.0 Lakhs towards the procurement of machinery and equipment in Soil Mechanics Lab was obtained during 2018 and machinery worth Rs.147 Lakhs is already procured and installed in the lab.
--- Received medal from CBIP for a contribution about the Permeability Characterisation of the Soils during 1960.
--- Received awards from the CBIP for developing an “ELECTRONIC TORPEDO” for measurement of settlements in earthdams in 1970.
--- Received a medal from the CBIP for a contribution about the Liquefaction Analysis in 1980. Based on analytical methods this laboratory has proved in 1983, that there will be no possibility for Liquefaction at Polavaram Barrage site. The design office insisted for experimental studies to be conducted at the school of Earth Quake Engineering, Roorke University which took more than five years time and cost about Rs.10,00,000/-. The results obtained from the above experiment were found to be in perfect agreement with the predictions based on Analytical studies.
--- This Lab has developed compression Index equation in 1980, which was found to be in perfect agreement with similar equations developed in other countries. Subsequently the compression index equations were then further refined and universally applicable compression index equation was developed in 1994. This work would eliminate the necessity of conducting costly and time consuming consolidation testing of most types of soils.
--- This laboratory has developed a new concept Shear Strength of Soils. By this the strength parameters of many types of soils can be estimated using a Mathematical Model developed for this purpose. This Mathematical model in a simple model compared to the other models such as Cam-Clay model, MIT-E3 & several constitutive relations in soils.
--- A Residual Shear apparatus for determining the Shear Strength of rock joints was designed and fabricated during 1980.
During the past years, many soil samples were tested in the Soil Mechanics Lab among which, a record of 1,205 soil samples were tested in a single year i.e 2018-19 for various ongoing projects like Kaleswaram and PRLIS which were urgent and important.
The soil test results were utilized for formation of embankments of Uddandapur Reservoir, Kurumurthyraya sagar reservoir, Venkatadri Reservoir of PRLIS and also for the formation of Embankments of Sri Komaravelli Mallanna sagar reservoir, Baswapur Reservoir, Kondapochamma reservoir etc. of Kaleswaram project.
The revenue collected towards testing charges and deposited in the PAO(W&P) during the past five years i.e. from 2015-16 to 2019-20 was to the tune of about 1.70 Crores.
In addition to the above works, the Administrative Approval for Rs. 215.0 Lakhs towards the procurement of machinery and equipment in Soil Mechanics Lab was obtained during 2018 and machinery worth Rs.147 Lakhs is already procured and installed in the lab.
--- Received medal from CBIP for a contribution about the Permeability Characterisation of the Soils during 1960.
--- Received awards from the CBIP for developing an “ELECTRONIC TORPEDO” for measurement of settlements in earthdams in 1970.
--- Received a medal from the CBIP for a contribution about the Liquefaction Analysis in 1980. Based on analytical methods this laboratory has proved in 1983, that there will be no possibility for Liquefaction at Polavaram Barrage site. The design office insisted for experimental studies to be conducted at the school of Earth Quake Engineering, Roorke University which took more than five years time and cost about Rs.10,00,000/-. The results obtained from the above experiment were found to be in perfect agreement with the predictions based on Analytical studies.
--- This Lab has developed compression Index equation in 1980, which was found to be in perfect agreement with similar equations developed in other countries. Subsequently the compression index equations were then further refined and universally applicable compression index equation was developed in 1994. This work would eliminate the necessity of conducting costly and time consuming consolidation testing of most types of soils.
--- This laboratory has developed a new concept Shear Strength of Soils. By this the strength parameters of many types of soils can be estimated using a Mathematical Model developed for this purpose. This Mathematical model in a simple model compared to the other models such as Cam-Clay model, MIT-E3 & several constitutive relations in soils.
--- A Residual Shear apparatus for determining the Shear Strength of rock joints was designed and fabricated during 1980.