Si guud marka loo hadlo, dhaldhalaalka ayaa ah dhacdo iftiimaya oo iftiimaysa, taasoo keenta in isha bini'aadamka ay si cad u aragto shay, oo aan ku raaxaysanayn isha bini'aadamka, amaba aan la arki karin.Sidaa darteed, naqshadeynta nalalka waxay u baahan tahay inay xaddiddo iftiinka.
Qeexitaanka caadiga ah ee dhaldhalaalka waa:
Dhacdo muuqaal ah oo sababa raaxo-darro ama yaraysa awoodda lagu eegayo tafaasiisha ama shayyada ay ugu wacan tahay qaybinta dhalaalka aan habboonayn ama kala duwanaanshaha dhalaalka ee goobta aragtida, ama jiritaanka kala duwanaanshaha dhalaalka xad dhaafka ah.-"Heerka Eray bixinta Iftiinka Dhismaha" JGJ/T 119-2008
Iftiinka isboortiga wuxuu isticmaalaa index glare (GR) si uu u qiimeeyo heerka iftiinka, taas oo ah cabbir maskaxeed si loo cabbiro jawaabta mawduuca ee goobaha ciyaaraha dibadda iyo goobaha kale ee bannaanka ee qalabka iftiinka si loo yareeyo muuqaalka iyo dareenka raaxo la'aanta ee ay keenaan indhaha bini'aadamka.Waxay ka timid heerka CIE.
Qaaciddada:
Lvi- dhalaalka daahyada iftiinka (cd/m2) ee uu dhaliyo iftiinka ka soo baxaya nalka oo si toos ah indhaha ugu garaacaya;
Iftiinka daahyada iftiinka (cd/m2) ee uu keeno iftiinka tooska ah ee isha ee uu keeno deegaanka
Qiimayaasha GR ee kala duwan ayaa muujinaya heerar kala duwan oo dhalaal ah, sida ku cad Shaxda 1.
Shaxda 1 Tilmaanta Dhallaanka iyo Darajada Dhallaanka
| Heerka tayada dhalaalaya ee GF | Heerka dhalaalka | Qiimaha GR |
| 1 | Aan la aqbali karin | 90 |
| 2 | - | 80 |
| 3 | Faragelin | 70 |
| 4 | - | 60 |
| 5 | Si dhib yar loo aqbali karo | 50 |
| 6 | - | 40 |
| 7 | La dareemi karo | 30 |
| 8 | - | 21 |
| 9 | ND | 10 |
GR=50-ka caalamiga ah ee la aqoonsan yahay waa iftiinka la aqbali karo ee dadka, markaa heerka caalamiga ahi wuxuu u baahan yahay in GR ee nalka ciyaaraha ee goobaha tartanka rasmiga ah aanu ka badnayn 50.
Marka si adag loo hadlo, qaacidada kor ku xusan waxay ku habboon tahay iftiinka goobta bannaanka, waddankeyguna wuxuu ku fidiyay codsigan goobaha gudaha, waxaana la dabaqay ilaa 2007. Si kastaba ha ahaatee, qiimaha GR ee iftiinka goobta gudaha ayaa loo baahan yahay inuusan ka badnayn 30.
Sida caadiga ah dhaldhalaalka waxaa loogu talagalay isha bini'aadamka, taas oo laga arki karo qeexida iftiinka.Si kastaba ha ahaatee, horumarinta baahinta ciyaaraha, tartamada waaweyn ayaa sidoo kale soo bandhigay shuruudaha iftiimaya ee kamaradaha.Tusaale ahaan, Ciyaaraha Olombikada waxay u baahan yihiin in GR-ga kamaraduhu aanu ka weynayn 40. Faahfaahinta, fadlan tixraac hal-abuurka qoraaga “Buugga Nakhshadda Isboortiga” (waxaa daabacay Shiinaha Korontada Press).
Waqtiga boostada: Oct-28-2020