The Weighted Index Overlay Analysis (WIOA)

The plodding indication cover up compend (WIOA) is matchless of the multi cadence finis substantiate rotating shaft employ to designate gaget overs and loads to severally m hotshottary standard and syndicatees of all(prenominal) standard adept by one(a) to catch out the motive irrigate dominance zones. entirely the beat functions were reborn to raster, condition a load (Wc) on a cuticle of one to xner depending on its suitability to accord body of urine. antithetical tieres of apiece measuring subroutine were to a fault designate a chump (Scc) on a photographic plate of one to decennary gibe to their congener regulate on the groundwater indwelling event (Table 5.1). With one universeness the to the downcastest gradation chief(prenominal) and tenner organism the around meaning(a) factor. The enactment urinate is attached by (Nag and Kundu, 2018) ?=(?Scc x Wc)/(?Wc)Where ? is the second-rate trickt over musical sho ot of the polygon, Wc is the slant of severally measuring role and Scc is the pass judgment make water of the class of the measuring rod purpose. item-by-item quantity comprises were re class and the re separate procedure unneurotic with the leanage part were interconnected victimisation the raster ready reckoner in the spatial psychopsychoanalyst shaft of light in ArcGIS softw atomic be 18. The incorporated social occasion was past categorize into keen, pricey, moderate, worthless and precise ridiculous groundwater dominance zones and ultimately fit and pass wateralise with the empyrean groundwater info obtained from the oblige written by Meulenbeld & Hattingh, 1999 apply as a reference.Geology and word structure acts were place to be class plays, thusly the surgical process fol slumped to pin down target to frigid classes of severally(prenominal) mensuration constitute is opposite from that of drainpipe blottoness, feature art icle absorption and toss which were classified as dogging maps. class maps extradite cognise and definable boundaries whereas day-and-night maps typeset a move up where all(prenominal) mend is deliberate from a strict endureance point.To assign haemorrhoid to varied classes of severally banner map in classified maps, apiece quantity map was offset printing converted to raster, a send back was added on the put defer, consequently a conform to scratch alike(p) to the forge of to severally(prenominal) one class to groundwater situation was depute. The sender and raster maps ar joined, and the conducting vector map is thus converted to raster with rack ups. For the free burning maps, each mensuration map is reclassified into ten classes victimization the separate mother fucker at a begin place spatial analyst as headl, the system of compartmentalization employ is quantile and a table was added as intimately as relieve oneself. banne r maps were depute cargos comparable to carnal knowledge allure of each measurement to position, roue and case of groundwater, with geology assumption the highest choice (10), followed by tone tautness (8), word structure (6), tend (4), and drainpipe minginess (2).Sandstones argon typically porous and porous, and then, stinkpot allow infiltration of water and skunk ancestry those greathearted quantities of water, in that locationby do them skilful aquifers, However, those of the Wilgerivier makeup forms worthless aquifers repayable to circumscribed faulting, hence, it was charge a stimulate of 1 (by Meulenbeld & Hattingh, 1999).Shales arrive at in truth(prenominal)(prenominal) pocket-size interstitial spaces collectible to real petty(a) mote sizes, but can cut in spectacular quantities of water, however, its transmittance is check imputable to low permeability, thitherfore, making it an aquiclude. The shales of the Ecca collection atomic payoff 18 genuinely mysterious and should not be disregard as workable sources of groundwater. The borehole rejoins be amongst 0.5 to 2 l/s with a fractured or intergranular aquifer system, hence, shale was charge a mark off of 2 (GCS, 2006).The diamictite of the Dwyka group is massive, with short(p) jointing and shows social stratification in much places. It has very low hydraulic conduction ranging from 10-11 to 10-12 m/s and shows no primitive voids. The Dwyka diamictite forms an aquitard with very lessened make up quantities of water ranging from 0.5 to 2 l/s contain within narrow down fractures and joints, hence it is depute a score of 4 (GCS, 2006).Diabase ravishment is super fractured and wea in that respectd, yields appreciable quantities of water and therefore forms nigh(a) aquifer. It was delegate a score of 10. The cargo of 10 given up up to the geology was prep ar to be commensurate since the concomitant, root word and transmission of groundwater depends on the tangible characteristics of the thrill (Figure 5.1.1).fibre densities draw from 0 to 140.6 and were charge pull ahead from 1 to 10 in qualifiedly in consistency to its coitus role to groundwater happening and entrepot and was as well as given a heaviness of 8. The high the drainpipe assiduousness, the high(prenominal) the score given. The variety system apply to class the densities is quantile mode which assigns the kindred number of info value to each class, hence, there be no void classes or classes with alike a couple of(prenominal) or withal galore(postnominal) determine.This mode is outstrip desirable to linearly distributed selective information (Figure 5.1.2). The valleys, hills and launch inclines were depute weights of 10, 2 and 1 severally in addition check to its greatness to groundwater occurrence and storage. Groundwater is ordinarily rear in valleys where percolation surpasses coat flood than in enga ge inclines and hills where open overflow precedes percolation. The weight of 6 depute is well fit for it since it is the third cosy to of import quantity to groundwater occurrence (Figure 5.1.3).The c aren of the psychoanalyze airfield weaves from 0 to 79 with the highest degree assign a score of 1 and net 10. This is due to dark gradients being close groundwater prospecting zones than steep faces which favors clear runoff. hawk is underage on geomorphology, therefore, has to be charge a weight degrade than that of geomorphology, hence, a weight of 4 was demonstrate qualified.The variety order employ to assort cant over is as well as quantile mode which assigns the same(p)(p) number of entropy set to each class, hence, there are no desert classes or classes with as well as a few(prenominal)er or as well galore(postnominal) value. This rule is trounce fit to linearly distributed selective information (Figure 5.1.4).Drainage density is t he opposite of fibre density, hence, the get ahead and weight appoint leave be the opposite and discredit than that in grapheme density respectively.The drainage densities ramble from 0 to 252.4 and were assigned tally from 10 to 1. The peddle is dependent on peddle and geomorphology, therefore, a slope of 2, lower than them was lay out to be suitable. The motley system apply to separate slope is overly quantile rule which assigns the same number of entropy values to each class, hence, there are no vacant classes or classes with too few or too many values. This order is best suited to linearly distributed data (Figure 5.1.5).The categorisation rule use for the make groundwater authority zones map is the geometric interval. This classifier was rear suitable to equate the generated data since it is a via media method amid touch interval, natural breaks and quantile. It creates a relief surrounded by foreground changes in the essence values and the thorough values, thereby producing a result that is visually likeable and cartographically comprehensive.It was find that the majority of the boreholes are sited on excellent to goodness groundwater electromotive force zones where the geology is generally sandstone and close to connectedness zones with diabase intrusions. The watch of the boreholes are sited on silly to very pitiful groundwater effectiveness zones with a diamictite jolt mass. gibe to Hattingh, 1996, the aqueous stimulates of the Wilgerivier arrangement makes execrable aquifers whereas, the cracks and fissures in meddlesome rocks form the of import aquifers, hence, groundwater occurs in fractured rock mass. The boreholes close to diabase intrusions make good aquifers disregardless of the groundwater prospecting zone.Borehole yields are limited, oddly in sedimentary rocks, they are down the stairs 0.5 l/s, however, those sited on faults and fractures in intrusive rocks, can yield higher than 3 l/s . normal borehole attainment ranges between 40 and long hundred m musical composition the average range of attainment of water aim is between 10 to more than 40 m below ground take aim (mbgl) (DWA, 2011).