Abstract
One of the crucial projects underway in Egypt is the lining of watercourses to withstand the outflow of water through their beds and flanks. Various materials have been used in this project, including limestone, sandstone, basalt, and dolomite, along with other building materials. This study focused on the evaluation of rock characteristics to determine their suitability for the construction of a canal lining. All rock characteristics should be classified in terms of technical and economic concerns related to mining rock specifications, such as mechanical and physical properties, and evaluated according to their weights and ratings. As a rule of decision making, management stakeholders select the rock types. The primary purpose of canal linings is to reduce water loss due to seepage. Methodologically, we adopted the technique for order of preference by similarity to ideal solution (TOPSIS), and derived an improved TOPSIS method based on experimental testing. This study attempted the first application of TOPSIS to canal linings and relevant construction materials. The analysis shows that limestone L1 is the best rock-building material for canal linings in Upper Egypt. Limestone L1 has the shortest geometric distance from the positive ideal solution and the longest geometric distance from the negative ideal solution. The results provide decision makers with strategic indicators to select among different rock types based on the total points assigned to all rock specifications.
Highlights
Egyptian governorates plan to construct linings in all canals connected to the Nile River
All methods were formulated according to the University of British Columbia (UBC) method, which was developed anAdlladmjuesthteoddfsowr aepreplfiocramtiounlaitnedthaisccsoturddiyn. gAtlol etqhueaUtioBnCsmweetrheofdor, mwuhliacthedwaansddleinvkeleodpuedsing andcealldsjuinsteadn Efoxrcealpsphlieceattitohnatinrepthriessesntuteddy.alAl lpl reoqpuearttiioesn,sawsseurme ifnogrmthualat ttehde apnrdopleinrtkyedwas usincogncseidllesriendainn Edxecteelrmshieneint gthaant raelpterrensaentitveed. aRllefperroepnecrintigest,oasthsuemvianlugethaastsitghneepdrtoopethrteyjth tcwhraietctfisephrvrcireioteooenpnpsrsrtieeiooordpnpfteysetrohrueiftsedsyteihinixitneshgpdeirEatxeehlqspttueesarerralemndttseiasoriatennnsidviasnweta(gi,11sv,wa)eww–n,h(21w5,ae,...)lrw.hteee,2rxr,wneij.an.i,xts.iaijv,ntihewsd.entRth,dheeaeefnecdTirdseeOicntoPihcnsSeiinoImTSgnOaptmtorProiatSxhctI,erSeistxhvsp,eaertslohueaceqeerueseasiqsevesuxasipiglvaernraneeelstdesewnetxtdoepwitirghneehesiftsgijvetohhdeft of in steps using Equations (1)–(5)
The TOPSIS technique was employed as a multi-criteria decision-making method for sustainable selection among different natural building materials considering the mechanical and physical properties and cost considerations
Summary
Egyptian governorates plan to construct linings in all canals connected to the Nile River. Canal linings are generally constructed from earth materials, such as different rock types, and the selection of suitable natural rock materials is very important. Rock types are classified into three categories—igneous, metamorphic, and sedimentary—which differ in their physical and mechanical properties. Because rocks have such different characteristics, selection of the best method for evaluating them is paramount. Watercourse linings play a role in the sustainability of irrigation projects because they maintain the outflow features and maximize water conservation by reducing leakage. Water canal linings in areas supplied by tube wells are significant, because water supplied by pumps is comparatively expensive. Reduced water infiltration limits the rise in the subsoil water table, thereby increasing the vulnerability of the surrounding areas to water logging
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