Indlela Yokubala I-Forest Biomass Yocwaningo Lwezemvelo
Ukubaluleka kocwaningo lwezemvelo kuyakhula njengoba ulwazi lomhlaba wonke mayelana nokushintsha kwesimo sezulu kanye nokuwohloka kwemvelo lukhula. Esinye isici esibalulekile ocwaningweni lwezemvelo ukuqonda i-biomass yamahlathi. I-biomass yamahlathi ibonisa inani lezinto eziphilayo ezitholakala endaweni yemvelo yamahlathi futhi ibalulekile ezifundweni eziningi zemvelo, kufaka phakathi lezo ezigxile ekujikelezeni kwekhabhoni, ukuqina kwe-ecosystem, kanye nokuhlukahluka kwezinto eziphilayo. Ukulinganisa i-biomass yamahlathi kuyinqubo eyinkimbinkimbi, kodwa ngamasu afanele, abacwaningi bangathola idatha enembile nethembekile. Lesi sihloko sizoxoxa ngezindlela ezahlukene ezingasetshenziswa ukubala i-biomass yamahlathi kumongo wocwaningo lwezemvelo.
Ukuqonda I-Forest Biomass
I-biomass yehlathi ivame ukuchazwa njengesisindo esiphelele sezinto eziphilayo ezikhona ehlathini ngesikhathi esithile. Lokhu kufaka phakathi zonke izinto eziphilayo ezifana nezihlahla, izihlahla, utshani, nezinye izinto eziphilayo, kanye nezinto eziphilayo ezifile ezifana namaqabunga neziqu ezifile. Ukulinganisa i-biomass kubalulekile ekuqondeni ukuguquguquka kwemvelo, ukusimama kwehlathi, kanye nendima yazo emjikelezweni wekhabhoni womhlaba wonke .
Indlela Yokulinganisa I-Biomass Yasehlathini
1. Ukulinganisa Okuqondile
Indlela eqondile ihilela ukuthatha amasampula emithi kanye nezinye izitshalo ensimini. Kodwa-ke, le ndlela ivame ukungasebenzi ezindaweni ezinkulu zamahlathi ngenxa yomsebenzi omkhulu nesikhathi esidingekayo. Izinyathelo ezilandelayo zisetshenziswa endleleni yokulinganisa ngqo:
– Ukukhetha Isampula Yendawo: Nquma isampula yendawo ehlathini okufanele ilinganiswe. Ubukhulu bendawo obuvame ukusetshenziswa bungama-10×10 metres noma ama-20×20 metres, kuye ngokuthi izitshalo zimi kanjani kanye nosayizi wazo.
– Ukulinganisa Ubukhulu Besihlahla: Kala ububanzi besihlahla ekuphakameni kwesifuba (i-DBH), okuvame ukuba ngamamitha angu-1.3 ngaphezu komhlabathi. Futhi, linganisa ukuphakama kwesihlahla usebenzisa i-clinometer noma elinye ithuluzi lokulinganisa.
– Izibalo zevolumu kanye ne-Biomass: Sebenzisa izibalo ze-allometric eziqondene nesifunda ezihlobanisa i-DBH kanye nokuphakama kwesihlahla ne-biomass. Isibonelo, i-Mayom equation noma i-linear regression.
Ukulinganisa okuqondile kunikeza idatha enembile kakhulu ezindaweni ezichaziwe, kodwa akumeleli njalo lonke ihlathi.
2. Indlela ye-Allometriki
Indlela ye-allometric isebenzisa ubudlelwano bezibalo phakathi kobukhulu besihlahla (njenge-DBH noma ukuphakama) kanye ne-biomass. Izibalo ze-allometric zakhiwa ngokuhlaziywa kwezibalo kwedatha ye-empirical evela ezihlahleni eziningi ezigawulwe futhi zalinganiswa ngamanani azo. Ezinye izilinganiso ze-allometric ezivamile ezisetshenziselwa ukulinganisa i-biomass yilezi:
– I-Chave Equation: Lesi sibalo sivame ukusetshenziswa ezindaweni ezahlukene zemvelo ezishisayo futhi sisekelwe kububanzi besihlahla, ukuphakama kwesihlahla, kanye nobuningi bezinkuni.
– Isibalo sikaBrown: Sisetshenziswa kakhulu ukulinganisa i-biomass yamahlathi asezindaweni ezishisayo ngokubheka imingcele efana nokuphakama kwesihlahla kanye ne-DBH.
Amaphutha ekulinganisweni kwe-biomass kusetshenziswa indlela ye-allometric angancishiswa ngokukhetha i-equation efanelana kahle nezimo zendawo kanye nohlobo lwezitshalo olufundwe.
3. Ukuzwa Okukude
Ubuchwepheshe bokubona kude buwusizo kakhulu ekulinganiseni i-biomass yehlathi, ikakhulukazi ezindaweni ezinkulu, okunzima ukuzifinyelela. Ukubona kude kuhilela ukusetshenziswa kwezithombe zesathelayithi, i-Light Detection and Ranging (LIDAR), noma izithombe zasemoyeni ukuthola ulwazi mayelana nesakhiwo sehlathi kanye nokwakheka kwalo.
– Izithombe Zesathelayithi: Izithombe zesathelayithi ezivela kumasathelayithi aseLandsat, Sentinel, noma eMODIS zingasetshenziswa ukulinganisa ukumbozwa komhlaba kanye nezinkomba zezitshalo ezifana ne-NDVI (Normalized Difference Vegetation Index) ehlobene ne-biomass.
– I-LIDAR: Ubuchwepheshe be-LIDAR busebenzisa ama-laser ukukala ibanga phakathi kwenzwa nento, okuvumela ukwakhiwa kabusha kwehlathi okunemininingwane eminingi. I-LIDAR iphumelela kakhulu ekulinganiseni ukuphakama kwesihlahla kanye nesakhiwo sehlathi.
Ukuhlanganiswa kwedatha yokuzwa kude nedatha yasensimini kubalulekile ekulinganiseni nasekuqinisekiseni amamodeli okulinganisa i-biomass.
4. Ukusetshenziswa Kwezinhlobo Zemifino
Amamodeli ezitshalo angamathuluzi okulingisa akwazi ukulingisa izinqubo zemvelo emahlathini futhi angasetshenziswa ukulinganisa i-biomass yehlathi. Lawa mamodeli ngokuvamile asekelwe emithethweni yemvelo kanye nobudlelwano phakathi kwezici zemvelo kanye nezimpendulo zezitshalo. Amanye amamodeli ezitshalo asetshenziswa kakhulu yile:
– Imodeli ye-LPJ-GUESS (Lund-Potsdam-Jena General Ecosystem Simulator): Le modeli ibonisa ukuguquguquka kwamaqembu asebenzayo ezitshalo ezindaweni ezahlukene zemvelo futhi inganikeza izilinganiso ze-biomass yamahlathi ngokusekelwe ezimweni zokushintsha kwesimo sezulu.
– Imodeli ye-ED (i-Ecosystem Demography): Le modeli ilingisa izinguquko esakhiweni se-ecosystem kanye nomsebenzi ngokusekelwe ekushintsheni kwezihlahla ngazinye kanye nokusebenzisana phakathi kwezinhlobo zehlathi.
Amamodeli ezitshalo adinga idatha yokufaka enemininingwane kanye nokuqinisekiswa ngedatha yasensimini noma ukuzwa okukude ukuze kuthuthukiswe ukunemba.
Izinselelo Namathuba
Nakuba kunezindlela ezahlukene zokulinganisa i-biomass yehlathi, indlela ngayinye inezinselele zayo kanye nemikhawulo yayo. Ukulinganisa okuqondile kukhawulelwe kakhulu ezikalini ezincane zokusebenza. Izindlela ze-allometric zidinga idatha yokufaka enemininingwane neyesifunda ukuze kuncishiswe ukubandlulula kokulinganisa. Ukubona kude, ngakolunye uhlangothi, kudinga ubuchwepheshe obuyinkimbinkimbi nobubizayo, futhi idatha ivame ukudinga ukucutshungulwa okwengeziwe ukuqinisekisa ukunemba.
Ngaphezu kwalokho, ukuhlanganisa izindlela eziningi kuvula namathuba okuthuthukisa ukunemba kanye nokusimama kwezilinganiso ze-biomass yamahlathi. Isibonelo, ukuhlanganisa ukuzwa okukude nezindlela ze-allometric noma amamodeli ezimila kunganikeza izilinganiso ezinembile nezithembekile.
Isiphetho
Ukulinganisa i-biomass yamahlathi kuyisinyathelo esibalulekile ocwaningweni lwezemvelo, okudinga indlela ehlukahlukene kanye nokuqonda okujulile ngezindawo zemvelo zamahlathi. Besebenzisa izindlela zokulinganisa eziqondile, izindlela ze-allometric, ubuchwepheshe bokubona kude, kanye namamodeli ezimila, abacwaningi bangalinganisa i-biomass ngokunemba okuphezulu nangokunembile. Ngenkathi indlela ngayinye inezinselele kanye nemikhawulo yayo, ukuhlanganisa izindlela eziningi kunikeza ithuba lemiphumela ehlanganisiwe nenolwazi.
Njengoba ubuchwepheshe kanye nendlela yokusebenza kuthuthuka, kulindeleke ukuthi izilinganiso ze-biomass yamahlathi zizoqhubeka zinembile, zinikeze ukuqonda okubalulekile ngokulondolozwa kwamahlathi, ukuphathwa kwemithombo yemvelo , kanye nokunciphisa ukuguquka kwesimo sezulu emhlabeni jikelele.
