Nguyen Thj MSy va Dtg Tsp chl KHOA HOC & CONG NGH? 109(09) 155 160 M O T S 6 T A I B i t N THIEN NHIEN TREN DIA BAN TINH THAI NGUYEN Hl£N TRANG, NGUYEN NHAN VA GIAI PHAP P H 6 N G C H 6 N G Nguyen Thj[.]
Nguyen Thj MSy va Dtg Tsp chl KHOA HOC & CONG NGH? 109(09): 155-160 M O T S T A I B i t N THIEN NHIEN TREN DIA BAN TINH THAI NGUYEN: Hl£N TRANG, NGUYEN NHAN VA GIAI PHAP P H N G C H N G Nguyen Thj MSy , Pham Huong Giang Tru&ng Dgi hpc suphgm - DH Thai Nguyen TOMTAT Thdi Nguyfin Id m^t tinh cd dja hinh chu ylu Id d6i mii thdp, thu^n lgi cho phdt frien ndng, lam nghiip va xay dyng cdc cong frlnh cdng nghiep Tuy nhlSn, b£n cgnh nhttng lhu$n lgi cho phdt friln kinh tl, cdn cd nhfhig khd khdn tai biln thi€n nhign gSy nhu: IQ qu^t, lu biin dd, trugt Id d^t, xdi mdn ddt , Cdc hi|n tugng dd khdng chi de Igi nhthig hgu qua moi trudng nSng nl, md cdn dnh hudng khdng nhd tdi su phdt triln kinh le - xa h^i, cung nhu ddi song ciia nhdn ddn tinh Nguyen nhfin hinh thdnh cdc tai biln khdng chi xudt phdt tir thien nhiSn md cdn cdc hoat ddng sinh song vd sdn xudt cua ngudi gdy Chinh vi vdy, vi?c nghifin ciru hien trang vd nguydn nhdn cdc logi hinh lai biln, trfin co sd dd dua dugc cdc giai phdp phdng chdng la van de het sire cdp thilt, cd y nghTa V^ ludn vd thuc lien cao Tir khda: lai biin, hi^n trgng, hgu qud, nguyin nhdn, gidi phdp HIEN TRANG MQT SO LOAI HINH TAI BI£N THifeN NHIEN THAI NGUYEN * Tai bien nut ddt vd irirgt l& ddi Cac viing co tiem nang phat sinh trugt Id dat, hogt dpng dja chan chii yeu tgp trung phia Tay Nam lien quan den day Tam Dao, va phia Tay Bic lien quan din day nui thuoc vdng eung Phli Ngu', khu vuc mil phia bac phd Thai Nguyen Tai biln nut ddt xay o dia ban tinh Thai Nguyen khong nhieu, hiy nhien cd miic dO kha Ion va gay anh huong khong nho toi moi trudng tu nhien va doi song kinh tl - xa hpi Truoc tien phai kl den vu nut, frugt 16 dat ddi Yen Ngua, thupc phudng Mo Bach Thai Nguyen, xay frong tliang 9/1992 Mpt khdi da ldn hinh tam giac vdi eae egnh 30 x 22 x 20m da trugt tir ddi Yen Ngua de bep mpt dogn vdi eac nha xay kien co tir - tang (tong cpng 16 hp) Day la vu nut, trugt Id dat kha nghiem frpng De khac phuc hgu qua, tinh da phai chi hang fram trieu dong Qua nghien cuu eho thdy, hien tupng nut, trupt Id dat xay chii ylu dilu kien dia chit va lac dpng eua ngudi Doi Yen Ngua dupc cau tu cac da lue nguyen tuoi Jura, vol the nim don nghieng, xuoi tir dinh ddi xudng chan taluy Tgi vi tri nut trupt ton tgi mpt dirt gay kien tao vudng goc vdi taluy Tren dinh doi noi dut gay eat qua cd mot hd bom thdi khang chien chdng My, nude mua tich dpng frong hd bom ri theo mat trugt diit gay va mat Idp da tgo nen hien tugng nut, frugt theo mat Idp, Thii hai la vu trugt Id ddt d phia Dong Nam Niii Hdng thupc huyen Dai Tir, xay vao Ihang nam 1995 Trugt ddt dien d noi cd dp ddc kha Idn, tgo nen mpt khoi trupt khong 16, chilu rgng dgt tir 3m tdi 400m trupt tu fren nui xuong canh dong, tren mot doan dudng dai hon 1500m Ngugc vdi diem nut trupt Mo Bgch, thi nam ciia cac da Trias ehua than d day Igi vudng gdc vdi sudn Ddng Nam Nui Hdng Qua ket qua nghien ciru khao sat, lai day De Tu da nhieu ldn xay cac hien tupng nut, trupt ddi Dilu d6 cho thdy, tinh bdt on dinh ciia dai kiln friic ddi vong cung Phu Ngii, [5],[6] Gdn day nhdt, rgng sang 15/4/2012, mpt khoi lugng ldm ddt da lir Khu bai thai so 3, Md than Phdn Ml (thupc eong ly eo phan Gang thep Thai Nguyen) da sat Id xudng khu vuc xdm Khudn I, xa Phuc Linh huyen Dai Tir tinh Thai Nguyen viii ldp hoan toan 10 ngoi nha, ngudi tir vong va I ngudi bi Ihuong Ddng thdi udc tinh ed hon 40 hd dan frong khu vuc phai di ddi di khae, Theo thdng ke ban ddu cua UBND huyen Dai Tir, vu sat Tel 01278262 828: Email maydhln@gmail com 155 Nguyen Thj Mdy vd Dtg Tgp chi KHOA HQC & CONG NGHE Id-bai thai d md than Phan Me gay thi?t hgi ve kinh te khoang 15 tl dong Trong dd c6 10 ngoi nha, 10 xe m^y, II li vl cimg lugng ldm gia sue, gia cam, hoa mau, rupng nuong Can ph^i ndi rdng tren day mdi chi \k mgt so hi?n lugng mil trugt dat da timg x^y khu v\rc nghien cuu nhiJng nSm gan day * Tai bien xdi mon vd thodi Iwa ddi Do tgp qudn khai thac sir dyng dat rimg I ^ nuong ray dien lau ddi d3 phd hogi hau het Idp phu thuc vat tren c^e mien dat doc, lim cho di?n tich rirng nguyen sinh hau nhu khdng cdn, dl?n tich rimg thir sinh cdn rat hgn che va chiem uu the la cay b\ii, trdng c6, dat doi mil trpe Dya vao h? thong phan cap thoai hda dat ciia Viet Nam, long dl?n tich ddt thoai hoa ciia tinh Thai Nguyen, co muc dp thoai hoa lir rat ylu den trung binh chilm 95%, eon lai 5% di?n tich bj thoai hda mgnh din rdt mgnh Nhung noi bi thoai hda manh chii yeu xay fren sudn mil ddc, ddt khdng day, da canh tac, fren cae ddi ddt tgo khe ranh, tgi vimg thdp ddt bj nen chgt va chua hda [3],[4] * Tai biin sat la b& sdng Hien tugng sgt Id bd sdng chu yeu chl dp dong chay ciia song gay nen, frong viing nghien cuu cd song Idn: sdng Cong va song cdu, viing thugng ngudn cua sdng bdt ddu lir VLing mil cd dp ddc dja hinh > 20", Cac sdng cd che dp dong chay khong dn djnh, nhat la eo nhii'ng Iran mua ldn, lugng nude chay Iran tren mat Idn ciing vdi dp ddc cua dia hinh lam eho che dp dong chay thay ddi mgnh Hai ben bd thudng xudt hien hien tugng sat Id bd song Trong viing nghien ciru hi^n tugng xay d Phii Binh, Pho Yen gay anh hudng din cac cdng trinh dan dyng, giao thong va khu dan eu sdng ven bd Qua nghien cuu thuc dia cho thdy hien tugng sat Id xay nhilu nhat d sdng Cau: Dogn tir Chg Ddn tdi Van Lang thupc sdng mien mii, cd Ihung lung hep Idng sdng nhilu ghlnh, thac, bai bdi it Tir Van Lang tdi ihanh phd Thai Nguyen sdng chay frong viing ddi mii thap, thung lung sdng da md rpng nhieu, song 156 109(09): 155- bd song vin chu yeu la da goc nen kha nang tai bien xdi Id bd sdng quy mo Idn rat it Dogn Thdi Nguyen - Phii Blnh, song chay viing doi bat iip va trimg tren ddi dut gay hogt dgng Yen Tu, bd song la b3i boi eao nen d day thudng xay xdi Id bd Tir Phii Binh tdi Phd Lai, sdng Cau chay vung dong bdng, bd sdng la cdc tgo Pleistocen, Holoeen, dd dogn tir Phii Binh xuong den xa Hgp Thjnh (Hifp Hda, Bdc Clang) sdng chay gan vudng gdcrvdi cac dirt gay hogt dpng Trung Luong (dudng 18), bd song thudng la bai boi nen nguy co xdi Id bd sdng cd the xay d Ha Chau (Phu Binh), Hoang Van (Hi?p Hoa), Tan Phii, Trung Thanh (Pho Yen) * Tai bien IH quit vd Id biin dd Lu quel va IQ biin da la log! hinh tai bien nguy hgi nhal thudng xuyen xay d nhieu noi fren lanh thd Thai Nguyen va cd xu hudng gia tang cd ve tan suat va eudng dp Mpt sd nam gan day, lu quel xuat hi?n khd thudng xuyen tren viing nui phia bdc va tay bdc tinh Thai Nguyen Tir nam 1994 trd lgi day frnng binh xudt hien fran lii/nam va dien tich chiu tai biln tir - km^ Cac viing thucmg xuyen bi ngap lut mua lii thudng nam d phia ddng nam phd Thai nguyen, phia tay Ddng Hy, Phd Yen va cac thung lung giira nui Cac viing bi ngap iing mua va kha nang thoat nude kem Id cac thung lung vung mii da vdi d Vd Nhai va Dinh Hod Cac khu vye thudng xuyen xay lu quel, lu dng, lu biin da Id d thugng ngudn eac sdng Chg Chu, sdng Nghinh Tudng va cdc phu luu cdp II bd phdis6ngCdng.[l],[2] NGUYEN NHAN M Q T SO LOAI HINH TAI BIEN THIEN NHIEN THAI NGUYEN Do cdc qud trinh dia dpng luc ngogi sinh Cdc qua trinh dja dpng lye ngogi sinh la nguyen nhan gay tai bien fren be mgt luu vyc Cdc qua trinh ngoai sinh frong viing nghien cuu bao gdm: * Nhom cdc hogt dgng irgng luc - Qua frinh trgng luc nhanh: Hoat dpng trpng luc nhanh xdy vdi cdc dgng: dd khdi, dd Nguyln Thj Mdy vd Dig Tgp chf KHOA HQC & CONG NGHE vyn tren sudn cd dg ddc Idn Day la nhiing qud trinh dgng lyc xdy nhanh, khdng dn djnh, nguy hiem, nhung dien phan bd khdng Idn Tren dia ban Thai Nguyen hogt d^ng g$p biSn d cdc khu vyc kieu dja hinh nui thap cau tao bdi dd vdi bi karst hda mgnh - Qua trinh frpng lyc tuong doi nhanh: Dd la eac boat dpng trugt khoi, trugt Id, trugt chdy, trugt trdi Trugt khoi xay tren cae sudn doc (> 25°) cd cdu tgo la cdc da phien s6t phan Idp, m$t phan Idp bj phong hda, giiia cdc Idp gdn ket kem, m$t Idp phu hgp vdi m§l d6c cua sudn Vao miia mua ca khoi dat da tren sudn trugt theo m|it Idp vd dl chuyin tuong d6i nhanh xuong phia dudi lap day ddy thung lung Qud frinh dpng lyc gay nen sy mdt dn djnh Idn eho dia hinh vd ldp vd phong hda ciing thd nhudng tren mgt va gay nguy hiem cho ngudi, nhdt Id ed hogt dpng eiia eon ngudi lam pha vd frang thai can bdng eua dia hinh, d(lc bl?t la cac taluy xay dyng dudng giao thdng Tai biln gap tren ede kieu dja hinh ddi cao, sudn loi - thdng, dinh nhpn hep keo ddi dgng day nhu khu vuc Ddi Y§n Ngya (TP Thai Nguyen), Niii Hdng, My Yen (Dai TiT), Linh Thdng, Phii Dinh (Dinh Hda), La Hien, Trang Xd (V5 Nhai) - Qua trinh trpng lyc chgm: Day la qua trinh chuyen dpng tir tir ve phia dudi ciia cae san pham phong hoa va ldp thd nhuong, xdy d nhiing noi cd dd dm cao, fren sudn ed vd phong hda vdi chieu day thay ddi khdng diu nhau, tgo be mdt ggn sdng theo ludng ngang va phii tran khdp sudn Vdo miia mua, cac vat li?u vun ciia vd phong hda va thd nhudng hi ngam nude, truong nd O nhiing nai cd vd phong hda ddy, thi tich cua chung tang Ien nhieu ban cung vdi sy tang khdi lugng ciia chung Idm cho chung bi djch chuyen xudng phia dudi Qua trinh ndy chiem phdn Idn dign tieh cdc sudn niii, chiing Id cdc qud trinh ngoai sinh thong fri fren cdc kieu dja hinh nui va mil thdp nhu khu vuc Lien Minh, Phuang Giao (V5 Nhai), Hda Trung, Hda Thugng (Dong Hy), Chg Ddn, Bdo Yen (Dinh Hda), Quan Chu, Yen Ldng (Dgi TiT) 109(09): 155- 160 * Hogt dpng rua trdi vd boc mdn Tren dia ban Thdi Nguyen hogt dgng ndy phd biln d eac nhdm kieu dja hinh ddi Bdn than cdc kieu it gay cdc tai bien mdi trudng, nhung chira dung mdt tiem nang xdi mdn Idn, Iam suy kigt, xdi mdn dat gdy ban qua lau dai, dgc biet la khdng cd bi?n phdp canh tdc vd khai thdc hgp ly sir dung dat * Nhdm hogt dpng cua dong chdy - Hogt dgng xdi rua: Hoat d^ng xdi rii'a phdt trien d phan giira va dudi eiia cac sudn mii, doi, noi nude mua chdy fran da dii de tgp trung Igi ede ddng chay nhd tren be mgt, qua frinh la- giai dogn phat trien tiep Iheo qud trinh nude chdy trdn vd tgo sy xdi nia be mat, md dau cho qua trinh xam thue, ldp thd nhudng da bat dau bi lon Ihuong va xuat hien cdc muong xdi nhd d fren ddt tham thuc vat da bi tan phd - Cac qua trinh ddng chay tgm thdi: Trong pham vi tinh Thai Nguyen, dua tren phan tieh dja hinh dia mao thi qua trinh phat frien rdng rai d viing Phiic Thugn, Dgi Tir va Quan Chu viing ddi ddng chay tgm thdi it gay su cd moi frudng, nhung la nguyen nhan chinh tao cac muong xdi ldm thoai hoa dat - Cac qua trinh dong chay thudng xuyen: Hoat dgng eiia ddng chdy thudng xuyen la xam thuc va bdi tu Xet ve khia cgnh tai biln, hoat ddng eiia ddng chay thudng xuyen ed the gay hien tugng sau: + Ung ngap d eac kieu dja hinh aluvi ria ddng bdng Bdc Bd, dong bdng day triing giua niii, ddng bdng day thung lung vd canh ddng karst nhu d Than Sa, Sdng Mdc (Vd Nhai), Ddng Bdm, Nam Hda (Ddng Hy), Trung Thanh, Thugn Thdnh (Pho Yen), Uc Ky, Xuan Phuong (Phu Binh) + Lii quel, lii biin da d viing cua sudi cd Idng din hgp, dd doc dia hinh Idn (>25°) vd dia tang bao gdm cdc fram tich mem bd hi nggm nude nhu vimg My Yen, Quan Chu (Dgi Tir), Phuc Thuan (Phd Yen) -I- Xdi Id bd sdng: Do hoat ddng dja mao ciia ddng chay thudng xuyen gay biln ddi Idng ddn, din tdi xdi Id bd sdng nhu chiing ta quan 157 Nguyen Thj Mdy va Dtg Tgp ehl KHOA HQC & CQNG NGHE sal thdy d dpc thung lung sdng Cau khu vyc Thdi Nguyen vd huygn Phii Binh Hinh thdi Idng ddn sdng ed quan h§ ch$t ch§ vdl cau tnic dja chat, d$c diem dja mgo d nhO'ng viing niii cao, dja hinh phdn cdt mgnh, cdc sdng thudng c6 Idng hgp, bd d6c, dp doc Idng sdng ldn, nhung phan Idn chimg chdy tren dd goc khd ben viing nen hl?n tugng xdi id bd it xdy Ngugc Igi, sdng chay qua cdc trung dja chdt ho$c nhOng vimg dja hinh thap va tucmg doi bdng phdng Idng sdng thudng md rgng, dp doc gidm, xudt hign nhilu khuc uon Tgi nhiing vimg nhu vay hign tugng boi ty vd xdi Id bd sdng thudng xdy Doi vdi hign tugng xdi Id bd sdng, tuong quan giii'a dpng lye ddng chdy va dg ben dd cau tgg nen bd sdng cd vai trd quyet djnh Tuy nhien dpng ndng ciia ddng sdng dupe phan bd khac fren cae dogn sdng vd cd quan hg mgt thilt vdi binh cdu friic Tan kien tgo va hinh thai ddng chdy eiia sdng Do cdc qud irinh dpng luc nhan sinh Hien trang phdt triln kinh tl - xa hgi fren lanh thd nghien euu cd anh hudng vd gdp phdn lam gia tang lai bien, * Phd rimg, phdt nuong ldm rdy Tinh trgng phat nuong lam ray, khai thac rimg khdng hgp ly da dua dien tich dat rimg xen nuong rdy chiem ly le ldn co edu dat su dung ciia loan tinh la mgt bat Igi rat dang ke cho viec bdo ve Idp phu thd nhudng Rimg chdng xdi mdn nhd siic cdn ddng chay ciia cay cdi, khdng cdn rimg, d nhii'ng noi eau tao dia chat cd ldp vd phong hda vyn tai Vao miia mua Idp dat sudn truang len, mem bd bao hda nude, trpng lugng lang nhanh, luc dinh kel lai yeu di nhieu sy vyn toi miia khd, chiing bj djch chuyen xudng phia dudi, luc ddu ed dgng id trugt chdy, trugt frdi, nhung lugng mua rao ldn, chiing vira bj trugl trdi vira bj ddng chay sudn xdi cudn mgt ddng lu biin da xudng ehan sudn va cudn tran len thung lung, dl lai da tang, cudi, eat ngdn ngang Tren dia ban Thdi Nguyen dien tieh ddt rimg xen nuong ray thudng phan bd d nhiing viing cao hon nhu khu vuc Nghinh Tudng, Sdng 109(09): 155-160 MOc, Phuang Giao (V5 Nhai), Phii Dinh, Linh Thong (Djnh Hda), My Yen, QuSn Chu (Dgi Tir) vd Idm mgt vdnh dai quanh vimg trung tam va viing phia nam Ngn pha rirng ldm rdy gia tdng d dau ngudn Idm gidm khd ndng dieu tiet nude, giam dp phi nhieu ciia dat, gay xdi mdn be m$t, trugt sgt Id, lu lyt d viing thap cd mua vua va hgn hdn d viing cao, viing sudn ddc hit mua - nhiing thien tai cd chieu hudng gia tdng Nhu vgy, vigc tien hdnh trdng tia lam nuong rdy tren cac viing dja hinh ddc, khdng tudn thil cdc quy trinh ky thugt bdo vg mdi trudng, hodc du canh du cu, chan thd tfr nhien thieu quy hogch da va dang lam gia tdng cac logi hinh tai bien * Khai thac khodng sdn Thai Nguyen cd tuong ddi nhieu logi hinh khoang sdn, day Id dilu kien thugn Igi de khai thac khoang sdn frd mgt frong nhiing ngdnh kinh te mui nhgn ciia tinh Tuy nhien, mpt d^c thil cua cdc logi tai nguyen khodng sdn Id thudng ndm sau giua cac vimg riing niil, vigc khai thac khoang sdn tdc dpng tryc tiep den nude ngam, he thdng sdng suol cho nen tiln hdnh khai thac mgt logi khoang san nao thi ddng thdi tac dgng den edc thdnh phdn tren Hgu qua Id rimg, dat bj tdn phd, nguon nude ngam, nude mat, khdng bj d nhiem Hon nii'a phdn ldn cac md chua cd phuong an hoan thd nen cac moong khai thdc vd bai thai se van tdn tgi ma chua cd gidi phdp xu li Tir da xay cdc hien tugng sut Id, xdi mdn, rua trdi xudng cdc khu vuc canh tac Dien hmh nhu md than Nui Hdng Phdn Ml da gay nhiing vu sgt Id ddt hit sue nghiem frgng Mpt van de het sire cap bdch hien Id tinh trang khai thdc vat ligu xdy dung (cat, sdi ) mpt cdch gt, khdng cd qui hoach va khdng quan li dugc da vd dang gay nhiing hgu qua nghiem trpng Chinh viec khai thdc ram rg ciia nhdn dan d hai ben bd sdng Cdu da ldm cho bd sdng bj xdi Id nghiem trgng, Iam biln ddi ddng chay Sdng Cdu la mot hai song ehinh ciia Thdi Nguyen nen ed vai tro het siirc quan frpng ddi sdng sdn xudt va sinh boat ciia nhan dan d day Tuy nhien qua trinh khai thdc dd ldm cho viec sgt Id diln mgnh me, nhdt Id miia mua lii gay Nguyen Thj May vd Dtg Tgp chf KHOA HQC & CONG NGHE anh hudng den dien tich dat vudn va nha cua ciia dan Hien khu vyc bj sat Id nghiem trpng nhat keo dai tir Tan Long, Quan Trieu, Quang Vinh, Tiic Duyen, Gia Sdng den Cam Gia, Luong Son Trong dd nhilu noi da sgt Id vao tir - 10 m Nguyen nhan ciia tinh trang la khdng cd ddt eanh tac, tgn dung thdi gian nong nhan vd dieu kien sdn cd nen ngudi ddn dd tim each muu sinh dl cai thien cupc sdng ciia minh va khai thac cdt sdi lai dang dugc xem la gidi phdp tot nhat KET LUAN vA KIEN NGHI Qua qud trinh nghien eiin, ehiing tdi dua mdt sd ket ludn sau ddy: - Cdc tai bien nut, trugt dat, xdi mon, thoai hda ddt, sgt Id bd sdng, lu biin da va lu quel xay fren dia ban tinh Thdi Nguyen dien hit siic phuc tgp ca ve khdng gian, thdi gian va gay nhiing hau qua khdn ludng cd ve ngudi va ciia - Cac tai bien neu fren thudc hai nhdm nguyen nhan chfnh: + Do cdc qud trinh dia dpng luc ngogi sinh: Nhdm cdc hogt dpng trpng luc la nguyen nhan chu yeu gdy cdc tai bien nirt, trupt dat va tai biln sgt Id bd sdng Nhdm hoat dgng riia froi vd bdc mon la nguyen nhan cua tai bien xdi mdn vd thodi hda ddt Nhdm hogt dpng ciia dong chay la nguyen nhan cda tai bien IQ quel va lii biin da + Do cdc qud trinh dia dpng li^c nhdn sinh Tinh frang phat nuong lam ray, khai thac rimg khong hpp ly va khai thdc khoang san bira bai la nguyen nhan thiic ddy cac tai biln trugt dat, xdi mdn, thoai hda ddt ciing nhu lii biin da va sgt Id bd sdng De phdng franh, khac phuc va giam nhe tai biln thien nhien fren dia ban Thai Nguyen, chiing toi xin de xuat mdt sd giai phap sau: * Gidi phdp phi cong trinh: • Td chure theo doi dien bien cua cae loai hinh tai biln vl qui md, cudng dp, hudng djch chuyin theo djnh ky, - Nhung thdng tin eanh bao va du bao phai duge thdng bdo kip thdi cho nhdn dan va phat lenh cap bao frong Irudng hgp khan cap 109(09): 155- 160 - Qudn ly khai thae khoang san va vgt lieu xay dyng; ngan chan va phd bd cac khu vuc khai thdc khodng san trai phep (khai thac vdng d Than Sa - Vo Nhai, khai thae quang thiec d Dgi Tir); phd bd cac ben bai d nhirng khu vuc lam hgn che dong chay gay nen hign tugng sgi Id bd sdng nhu khu vyc chdn cau Da Phiic Pho Yen - cdn khoanh viing cd nguy co tai biln vdi ede cap khac nhau, di ddi dan khdi khu vuc nguy hiem, nhal la cdc khu vyc gan bai thai eiia eae md than nhu Phan Me (Phii Luong), Niii Hdng (Dgi Tir) * Gidi phdp cong trinh: - Bdo ve rirng dau ngudn, rimg phong hg va Irong rirng d khu vye thugng ngudn, dat trdng ddi mii trpe, noi cd lugng mua Idn nhu d thugng nguon hai sdng ldn la sdng Cau (Van Lang - Ddng Hy) va sdng Cdng (Quan Chu, My Yen - Dgi Tir), - Sua be mat mai doe, thap mai ddc hogc xay dung cac cdng frinh chdng dd cac tai bien trugt, sgt Id ddt, nhat la doe eung dudng tu Dinh Ca di Thdn Sa, Nghinh Tudng, Sang Mdc - Qui hoaeh xay dung nha eiia, dudng sa, eau cong, kenh muong, de dap,., dam bao khdng ngan can sy luu Ihon^ ddng chay cd lu dpc theo hai bd sdng Cau va sdng Cdng TAI LIEU THAM K H A O [1] Lai Huy Anh (2011), Nghien cuu hiin trgng du bdo diin biin mot s6 loai hinh then tai tinh Thdi Nguyen vd di xudt gidi phdp phong trdnh khdc phuc, Ky yeu hdi ihao khoa hoc dja ly, (2], Nguyln Van Cu (2001), Nghien cuu hiin trgng, di^ bdo dien bien mot so logi hinh thien ta tinh Thai Nguyen vd di xudt gidi phdp phong trdnh khdc phuc, Bdo cdo kll qud dl lai KHCN [3] Nguyln Dinh Hoe, Nguyln Thi Thon (2011), Dia chdt moi trudng, Nxb Dai hoc Qudc gia Ha Noi [4] Trdn Trpng Hue (2003), Nghien cuu ddnh gia tSng hgp cdc logi hinh lai bien dia chdt tren Idnh Viit Nam vd cdc gidi phdp phdng chong Ha N6i [5] Trdn Vilt Khanh (1998), "Nghien ciiu qua trinh phong hoa viing D6ng Bdc Tam Dao", Tgp chi KH&CN DHTN, s6 2/1998 [6], Trdn Vilt Khanh (1998), "Trdm tich de lit va dia hinh bdi lu vimg Ddng Bdc Tam Ddo", Tap chi KH&CN DHTN, s6 5/1998 Nguyen Thj Mdy va Org Tgp chl KHOA HQC & CONG NGH$ 109(09): 155- 160 SUMMARY SOME TYPES NATURAL DISASTER IN THAI NGUYEN PROVINCE: STATUS, CAUSE AND PREVENTION SOLUTIONS Nguyen Thi May', Pham Huong Giang College of Education - TNU Thai Nguyen province's terrain mostly low mountains, facilitate the development of agriculture, forestry and industrial consfruction projects However, besides the favorable conditions for economic development, there are other difficulties caused by natural disasters such as: floods, flood debris, landslides, soil erosion, etc The phenomenon is not only lo severe environmental consequences, but also no small influence on the socio-economic development, as well as the lives of people in the province Formation causes accidents not only from nature but also by the activities of living and production of man-made Therefore, the study of the current status and cause all kinds of disasters, thereby making the solution against a very urgent problem, with theoretical and practical significance Key words: disasters, status, consequences, causes, solutions Ngdy nhgn bdi; 08/3/2013; Ngdy phdn bi?n: 23/3/2013; Ngdy duyet ddng: 02/10/2013 Phan bien khoa hoc: PGS TS Nguyin Thi Hdng - Truang Dgi hoc Suphgm -DH Thdi Nguyen Tel: 01278.262 828: Email- maydhln@gmail a 160 ... Cac tai bien neu fren thudc hai nhdm nguyen nhan chfnh: + Do cdc qud trinh dia dpng luc ngogi sinh: Nhdm cdc hogt dpng trpng luc la nguyen nhan chu yeu gdy cdc tai bien nirt, trupt dat va tai. .. NGUYEN NHAN M Q T SO LOAI HINH TAI BIEN THIEN NHIEN THAI NGUYEN Do cdc qud trinh dia dpng luc ngogi sinh Cdc qua trinh dja dpng lye ngogi sinh la nguyen nhan gay tai bien fren be mgt luu vyc Cdc... Binh), Hoang Van (Hi?p Hoa), Tan Phii, Trung Thanh (Pho Yen) * Tai bien IH quit vd Id biin dd Lu quel va IQ biin da la log! hinh tai bien nguy hgi nhal thudng xuyen xay d nhieu noi fren lanh thd