Yadda Ake Gudanar da Binciken Daji Ta Amfani da Jirgin Sama Mara Matuki
Binciken dazuzzuka yana da matuƙar muhimmanci don fahimtar yanayin muhalli, sa ido kan canje-canjen rufin ƙasa, gano ɓarna, da tallafawa tsare-tsaren kiyayewa da kula da albarkatun ƙasa. A cikin 'yan shekarun nan, amfani da jiragen sama marasa matuƙa (UAVs) ya zama mafita mai shahara saboda ikonsu na tattara bayanai cikin sauri, dalla-dalla, kuma cikin aminci idan aka kwatanta da binciken ƙasa, wanda ke buƙatar dogon lokaci kuma yana buƙatar ƙasa mai wahala. Jiragen sama marasa matuƙa na iya taimakawa wajen taswirar yankunan dazuzzuka, gano ciyayi, da kuma sa ido kan gobara da sare bishiyoyi ba bisa ƙa'ida ba yadda ya kamata. To, ta yaya kuke gudanar da binciken dazuzzuka ta amfani da jirgin sama mara matuƙa? Ga cikakken jagora.
1. Kayyade Manufar da Bukatun Binciken
Mataki mafi mahimmanci na farko shine a fayyace manufofin binciken. Waɗannan manufofin za su yi tasiri ga nau'in jiragen sama marasa matuƙa, na'urori masu auna firikwensin, hanyar tashi, da kuma sarrafa bayanai. Wasu manufofi gama gari don binciken gandun daji sun haɗa da:
- Taswirar rufin ƙasa don tantance girman dazuzzuka, wuraren buɗewa, ko canje-canje akan lokaci.
– Kayan lambu (yawan canopy, takamaiman nau'ikan shuke-shuke, lafiyar canopy).
– Kula da ayyukan da ba bisa ƙa'ida ba kamar sare bishiyoyi ba bisa ƙa'ida ba da kuma share filaye.
– Binciken haɗarin gobara da kuma sa ido kan bayan gobara.
– Tsarin gyara da kuma kimanta nasarar sake dasawa.
Idan burinka yana buƙatar bayani game da tsayin rufin ko tsarin ciyayi, ƙila ka buƙaci na'urar firikwensin ta musamman kamar LiDAR. Duk da haka, don sauƙaƙe taswirar taswira da takardun gani, kyamarar RGB ta yau da kullun sau da yawa ta isa.
2. Zaɓar Jirgin Sama Mai Sauƙi da Na'urar Firikwensin Da Ta Dace
Zaɓin jiragen sama marasa matuƙa yana da matuƙar tasiri ga yanayin filin da kuma yankin da ake ɗaukar nauyinsu. Gabaɗaya, akwai nau'ikan jiragen sama marasa matuƙa guda biyu da ake amfani da su akai-akai:
1. Multirotor (quad/multi-copter)
Ribobi: tsayayye, mai sauƙin sarrafawa, ya dace da ƙananan wurare matsakaici, mai iya tashi ƙasa da ɗaukar hotuna dalla-dalla.
Rashin amfani: gajeriyar lokacin tashi (matsakaicin mintuna 20-40).
2. Reshe mai gyara (reshe mai gyara)
Fa'idodi: kewayon da ke da faɗi, tsawon lokacin tashi, ya dace da manyan bincike.
Rashin amfani: yana buƙatar wurin tashi/sauka da ƙwarewa mafi girma.
Baya ga jirgin sama mara matuki, yi la'akari da na'urori masu auna firikwensin da aka yi amfani da su:
- Kyamarar RGB don hotuna masu inganci, taswira ta asali da takaddun gani.
– Nazari kan lafiyar shuke-shuke da yawa (misali NDVI).
- Zafin jiki don gano wurare masu zafi, dabbobi, ko gobara da wuri.
- LiDAR don taswirar tsarin gandun daji, gami da tsayin bishiyoyi da samfuran saman ƙasa a ƙarƙashin rufin.
3. Sarrafa Izini da Bangarorin Tsaro
Binciken jiragen sama marasa matuki yana ƙarƙashin ƙa'ida. Tabbatar kun fahimci ƙa'idodin jirgin sama marasa matuki a yankinku, gami da iyakokin tsayi, wuraren da aka haramta, da buƙatun rajista. Idan ana gudanar da binciken a wuraren kiyayewa ko wuraren shakatawa na ƙasa, yawanci ana buƙatar izini na musamman daga hukumomin yankin.
Bugu da ƙari, ƙirƙiri tsarin tsaro:
– Duba yanayi da saurin iska.
– A guji tashi sama kusa da wuraren zama ko cunkoson jama'a.
– Shirya hanyoyin gaggawa idan jirgin sama mara matuki ya rasa sigina ko kuma ya fuskanci tsangwama.
– Kawo sauran batura da na'urorin sadarwa.
Tsaron masu aiki, ƙungiyoyi da muhalli babban fifiko ne.
4. Tsarin Shirin Jirgin Sama
Matakin tsara manufa yana da matuƙar muhimmanci ga ingancin bayanai. A lokacin tsarawa, kuna buƙatar tantancewa:
– Yankin da ke da Sha'awa (AOI): iyakar yankin binciken a cikin siffar polygon.
– Tsawon jirgin sama: ƙasan tsayin, sakamakon zai yi cikakken bayani, amma tsawon lokacin ɗaukar hoto zai daɗe.
– Haɗa hotuna: gabaɗaya kashi 70–80% a gaba da kashi 60–70% a gefe don ɗaukar hoto.
- Tsarin hanyar tashi: grid ko grid biyu don tabbatar da daidaiton rufewa.
– Nisa Daga Samfuran Ƙasa (GSD): Girman pixels ɗin da ke ƙasa, alama ce ta ƙudurin taswira.
Yi amfani da manhajar tsara jiragen sama kamar DJI Pilot, Pix4Dcapture, DroneDeploy, ko Mission Planner (ya danganta da na'urarka). Haka kuma, kula da yanayin dazuzzuka: rufin da ke da yawa da bambancin tsayi na iya shafar ingancin taswirar.
5. Shirya Ma'ajiyar Kula da Ƙasa (GCP) don Daidaito
Idan binciken yana buƙatar cikakken daidaito (misali, don taswirar iyakokin ƙasa ko tsara injiniya), ya fi kyau a yi amfani da Ma'aunin Kula da Ƙasa (GCPs). GCPs wurare ne na tunani a ƙasa waɗanda aka auna daidaitawarsu ta amfani da GPS/RTK na geodetic.
Matakan:
– Yaɗa GCPs a wurare da dama na dabarun bincike (kusurwa da tsakiya).
– Yi amfani da alamun da ake iya gani a sarari daga iska.
– Yi rikodin daidaitawar a hankali kuma a cikin tsari wanda ya dace da software na sarrafawa.
Idan ka yi amfani da jirgin sama mara matuki mai amfani da RTK/PPK, za a iya rage yawan GCPs, amma har yanzu suna da amfani a matsayin wuraren bincike.
6. Aiwatar da Bincike a Fagen Aiki
A ranar taron, yi jerin abubuwan da za a yi kafin a tashi:
- Daidaita kamfas da IMU idan ya cancanta.
– A tabbatar batirin ya cika kuma katin ƙwaƙwalwar ajiya ya isa.
– Duba yanayin propellers da jikin drone.
– Tabbatar cewa saitunan kyamara sun yi daidai: saurin rufewa, ISO, mayar da hankali, da tsarin fayil.
Yi tafiyar kamar yadda aka tsara. Don binciken gandun daji, kula da abubuwa da yawa masu mahimmanci:
– A guji tashi sama da ƙasa a kan rufin bishiyoyi saboda haɗarin karo.
– Kiyaye kwanciyar hankali na jirgin sama don kada hoton ya yi duhu.
- Rikodin rajistar jirgin sama da yanayin filin (yanayi, lokaci, matsalolin fasaha).
Idan yankin yana da girma sosai, yi gwajin tashi da yawa kuma a tabbatar an gudanar da sarrafa batir cikin tsari.
7. Sarrafa Bayanai (Photogrammetry da Bincike)
Da zarar an tattara bayanan, mataki na gaba shine a sarrafa hotunan ko bayanan firikwensin zuwa samfurin taswira. Ga hotunan RGB/multispectral, wata hanya da aka saba amfani da ita ita ce photogrammetry, ta amfani da software kamar Agisoft Metashape, Pix4Dmapper, ko WebODM.
Sakamakon da aka saba samu sun haɗa da:
– Orthomosaic: taswirar hoto da aka gyara ta hanyar geometric.
– Samfurin Sama na Dijital (DSM): samfurin saman ciki har da rawanin bishiyoyi.
- Tsarin Ƙasa na Dijital (DTM): Tsarin saman ƙasa (ya fi wahala a cikin dazuzzuka ba tare da LiDAR ba).
– Gajimare mai maki: Bayanan maki na 3D don nazarin tsari.
Don nazarin lafiyar shuke-shuke, zaku iya ƙididdige fihirisa kamar NDVI daga bayanan multispectral. Don gano canje-canje, kwatanta orthomosaics daga lokaci daban-daban kuma ku yi rarraba murfin ƙasa.
8. Fassarar Sakamako da Rahoton
Ana buƙatar fassara bayanan da aka gama zuwa bayanai masu sauƙin fahimta. A wannan matakin, za ku iya:
– Auna yankin murfin daji da wuraren budewa.
– Gano hanyoyin shiga ba bisa ƙa'ida ba ko wuraren yin sare bishiyoyi.
– Kayyade wuraren da suka fi muhimmanci don gyara.
- Ƙirƙiri taswira masu jigo da rahotannin fasaha.
Rahoton mai kyau yawanci ya haɗa da:
– Manufofin bincike da wurin da ake.
- Bayanan jiragen sama marasa matuka, na'urori masu auna firikwensin, da sigogin tashi.
– Hanyoyin sarrafa bayanai da matakan daidaito.
– Babban binciken tare da taswira da takardun gani.
– Shawarwari kan bin diddigin lamarin.
9. Kalubalen da Aka Saba Yi da Nasihu Masu Amfani
Binciken gandun daji yana da ƙalubale na musamman, waɗanda suka haɗa da:
- Siginar GPS da sadarwa na iya lalacewa ta hanyar yanayin ƙasa da murfin rufin.
– Haske mara daidaito saboda inuwar bishiyoyi, musamman lokacin da rana ta yi ƙasa.
– Bambancin tsayi yana haifar da haɗuwa mara daidaito idan ba a daidaita tsayin jirgin ba.
Nasihu don samun nasara a binciken:
– Tashi a cikin yanayi mai haske tare da iska mai ƙarancin iska.
– Yi ƙoƙarin yin binciken kusa da tsakar rana domin inuwar ta yi gajeru.
- Yi amfani da yanayin atomatik don kiyaye daidaiton hanya da haɗuwa.
– Ajiye bayanai akai-akai kuma ƙirƙirar madadin bayanai a fagen.
– Idan zai yiwu, a haɗa bayanai marasa matuƙa da bayanai na filin (gaskiya ta ƙasa) don ƙara inganci.
Penutup
Gudanar da binciken gandun daji ta amfani da jiragen sama marasa matuƙa hanya ce ta zamani wadda ke ba da sauri, daidaito, da kuma sassauci mai yawa. Tare da tsari mai kyau—tun daga tantance manufofi, zaɓar jiragen sama marasa matuƙa da na'urori masu auna sigina, samun izini, tsara ayyuka, zuwa sarrafawa da nazarin bayanai— jirage marasa matuƙa na iya zama kayan aiki mai matuƙar tasiri don taswirar gandun daji da sa ido. A tsakiyar ƙalubalen da ke ƙaruwa na sare dazuzzuka da lalacewar ƙasa, fasahar jiragen sama marasa matuƙa na taimaka wa ɓangarori daban-daban su yanke shawara bisa ga bayanai da kuma hanzarta ƙoƙarin kiyayewa da kuma kula da dazuzzuka masu ɗorewa.
Idan kuna so, zan iya taimaka muku ƙirƙirar samfurin tsarin tashi wanda ya cika da sigogin tsayi, haɗuwa, da kuma kimanta tsawon rayuwar batirin da aka bayar a wani yanki.
