## 3 Strategies to Reduce Quarrying Activity in Sardinia
### Assessment of the Demand for Inert Materials in Cagliari, Sant'Antioco and Tortoli
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline  & \multicolumn{4}{c}{**Cagliari**} & \multicolumn{4}{c}{**Demand Estimation (Aggregates**} & \multicolumn{4}{c}{**Estimination of Required Aggregates For**} \\  & & & & & & **for New Construction and** & & & & & \\  & & & & & & **Maintenance (Cubic Metens)** & & & & \\ \hline \multirow{3}{*}{**Homogeneous Zone**} & **Existing** & **Max Realizable** & **Volume to be** & **Inhabbitants** & **Max Expected** & & & & & \\  & **Volume** & **Volume** & **Realized** & **Inhabbitants** & **Construction for** & **Visibility** & & & & \\  & **Volume** & **Volume** & **(Max,\_PeV)** & **(Data from** & **Data from** & **Homogeneous Zone** & **Visibility** & & & \\  & **(Vex)** & **(Vmax,\_R)** & **(Vmax,\_PeV)** & **(UMP)** & **(UMP)** & & & & & \\ \hline A zone & 5,522,043 & 5,522,043 & 0 & 18,208 & 18,654 & 33,132 & 6,185 & 0.211 & \\ B zone & 25,514,752 & 28,374,890 & 1,802,372,370 & 141,411 & 159,168 & 519,636 & 27,835 & 0.343 & 0.554 \\ C zone & 1,222,686 & 3,116,655 & 1,893,969 & 12,659 & 30,599 & 386,130 & 102,291 & 1.596 & 1.596 \\ TOTAL & **33,299,481** & **36,956,187** & **3,696,706** & **172,008** & **208,421** & **398,898** & **136,311** & **2.150** \\ \hline \multicolumn{1}{c}{**San/Antode**} & \multicolumn{4}{c}{**Demand estimation (Aggregates} & Estimation of required aggregates for for new construction and & & & & \\  & **Existing** & **Max Realizable** & **Volume to be** & **Inhabbitants** & **Max Expected** & & & \\  & **Volume** & **Volume** & **Realized** & **(data from** & **(data from** & **Homogeneous Zone** & & \\  & **(Vex)** & **(Vmax,\_R)** & **(Vmax,\_PeV)** & **(UMP)** & **(UMP)** & & & & \\ \hline \hline A zone & 1230,500 & 135,500 & 15,000 & 800 & 900 & 3723 & 414 & 0.460 & \\ B zone & 2,544,259 & 2,544,259 & 0 & 25,442 & 25,442 & 15,266 & 5249 & 0.810 & 1.270 \\ C zone & 485,032 & 884,862 & 399,830 & 4851 & 8849 & 83,876 & 41,899 & 1.410 & \\ F zone & 174,124 & 985,080 & 810,956 & 2902 & 16,418 & 163,236 & 271,596 & 2.649 & 4.059 \\
**TOTAL** & **3,323,915** & **4,596,701** & **12,278,786** & **33,995** & **31,409** & **265,101** & **319,118** & 5.832 & \\ \hline \multicolumn{1}{c}{**TOToli**} & \multicolumn{4}{c}{**TOToli**} & \multicolumn{4}{c}{**TOToli**} & \multicolumn{4}{c}{**TOToli**} & \multicolumn{4}{c}{**TOToli**} & \multicolumn{4}{c}{**TOToli**} & \multicolumn{4}{c}{**TOToli**} \\ \hline  & **Existing** & **Max Realizable** & **Volume to be** & **Inhabbitants** & **Max Expected** & & & & \\  & **Volume** & **Volume** & **Realized** & **(data from** & **(data from** & **Homogeneous Zone** & & \\  & **(Vex)** & **(Vmax,\_R)** & **(Vmax,\_PeV)** & **(UMP)** & **(UMP)** & & & & \\ \hline \hline A zone & 5857,57 & 548,573 & 0 & 1960 & 3292 & 11,469 & 0.753 & \\ B zone & 1,410,815 & 1,410,815 & 0 & 5039 & 8465 & 2713 & 0.222 & 0.975 \\ C zone & 1,388,553 & 2,119,832 & 731,728 & & 8231 & 154,857 & 483,407 & 7.751 & \\ F zone & 483,001 & 629,841 & 224,024 & & 11,749 & 47,703 & 45,387 & 0.792 & 8.543 \\ TOTAL & **3,851,106** & **4,708,868** & 955,302 & 0 & **26,979** & **214,047** & **542,976** & **9.518** & \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Estimation of the demand for aggregates in Cagliari, Sanf’Antícoco and Tortoli based on UMP forecasts (Source: data from UMPs under study). In order to focus on the residential completion (\"C\" zone) and tourism areas (\"F\" zone), the authors did not consider the enterprise and industrial areas (\"D\" zone) and recreational and service areas (\"G\" zone). In this way, we could compare C and F zones with the remaining residential areas that have a predominantly historic fabric (A and B zones). This analysis allowed us to understand how to contain both the consumption and demand for soil resulting from expansion in these zones. The authors identified that the highest territorial indices (TI) [42] correspond to A and B zones, while the remaining zones (C and F) correspond lower values (Table 6).