Abstract : the restoration of the riparian vegetation disturbed by human activities is one of the hotspots of watershed ecology. through interpreting the images of remote sensing in 1985 and 1999, the basic information of forest resources of lushuihe forest bureau, which is a typical forest area of changbai mountain, was obtained with support of gis. by dividing land covers of lushuihe area into 10 types ( water body, residential land, stump land, farming land, wetland, mature conifer forest, midlife conifer forest, mature broadleaf forest, midlife broadleaf forest, and man - made young forest ) and dividing the riparian zone into four buffers ( in turn, 1000, 2000, 3000, 4000 m away from the river ), the changes of riparian forest resources during 1985 - 1999 were analyzed. the results showed that the deforestation intension has obviously decreased and the whole environment has been evidently improved, but the riparian ecosystem was still flimsy. in buffer 1, 2, 3, the area of midlife conifer forest increased largely, but the areas of other types of land covers all decreased. midlife conifer forest had a comparatively good status in the three buffers. in buffer 4, midlife conifer forest, mature conifer forest, and mature broadleaf forest formed a forest - age rank that is helpful to stabilize the forest ecosystem and exert its functions. area percentage of wetland decreased in buffer 1, buffer 2, and buffer 3, even in buffer 4 in which forest ecosystem rehabilitated comparatively well, so protecting and rehabilitating wetland is a very difficult task
文摘:本文對兩期遙感圖像進行解譯,並在gis支持下提取露水
河林業局主要
河流兩岸各緩沖區森林資源信息,經分析得到各類地物在1985年及1999年的變化趨勢.結果表明:在
河流沿岸對森林的採伐強度1999年較1985年明顯減小,整體生態環境較1985年有所改善.在緩沖區1 , 2 , 3除中齡針葉林大幅度增加外,其它地物類型面積均減少,由此可以看出,在這三個緩沖區內針葉林得到了較好的
恢復.在緩沖區4內,中齡針葉林、成熟針葉林、成熟闊葉林形成一個林齡梯隊,有利於森林生態系統的穩定與功能的發揮,十五年間緩沖區4受到的干擾相對較小.濕地數量在四個緩沖區內均有所減少,雖然在緩沖區4內森林生態系統
恢復的較好,但濕地面積仍有所減少,說明保護及
恢復濕地資源是一件非常艱巨的任務,必須引起高度重視.圖5表2參12
The restoration of the riparian vegetation disturbed by human activities is one of the hotspots of watershed ecology. through interpreting the images of remote sensing in 1985 and 1999, the basic information of forest resources of lushuihe forest bureau, which is a typical forest area of changbai mountain, was obtained with support of gis. by dividing land covers of lushuihe area into 10 types ( water body, residential land, stump land, farming land, wetland, mature conifer forest, midlife conifer forest, mature broadleaf forest, midlife broadleaf forest, and man - made young forest ) and dividing the riparian zone into four buffers ( in turn, 1000, 2000, 3000, 4000 m away from the river ), the changes of riparian forest resources during 1985 - 1999 were analyzed. the results showed that the deforestation intension has obviously decreased and the whole environment has been evidently improved, but the riparian ecosystem was still flimsy. in buffer 1, 2, 3, the area of midlife conifer forest increased largely, but the areas of other types of land covers all decreased. midlife conifer forest had a comparatively good status in the three buffers. in buffer 4, midlife conifer forest, mature conifer forest, and mature broadleaf forest formed a forest - age rank that is helpful to stabilize the forest ecosystem and exert its functions. area percentage of wetland decreased in buffer 1, buffer 2, and buffer 3, even in buffer 4 in which forest ecosystem rehabilitated comparatively well, so protecting and rehabilitating wetland is a very difficult task
本文對兩期遙感圖像進行解譯,並在gis支持下提取露水
河林業局主要
河流兩岸各緩沖區森林資源信息,經分析得到各類地物在1985年及1999年的變化趨勢.結果表明:在
河流沿岸對森林的採伐強度1999年較1985年明顯減小,整體生態環境較1985年有所改善.在緩沖區1 , 2 , 3除中齡針葉林大幅度增加外,其它地物類型面積均減少,由此可以看出,在這三個緩沖區內針葉林得到了較好的
恢復.在緩沖區4內,中齡針葉林、成熟針葉林、成熟闊葉林形成一個林齡梯隊,有利於森林生態系統的穩定與功能的發揮,十五年間緩沖區4受到的干擾相對較小.濕地數量在四個緩沖區內均有所減少,雖然在緩沖區4內森林生態系統
恢復的較好,但濕地面積仍有所減少,說明保護及
恢復濕地資源是一件非常艱巨的任務,必須引起高度重視.圖5表2參12
It decides the protective objectives for different ecological reserve area based on the study of channel wetlands and survey and analysis of top - grade species ( fishes ) of the yellow river : from the point of the basin, the main ecological protective objectives of the tipper stream are vegetation and forest for conservation of water supply ; soil and water conservation is the main in the middle reaches for vegetation protection and rehabilitation and ; the lower reaches takes types of wetlands protection and wetlands area maintenance as the main, protecting biodiversity and important birds resources
在黃
河河道濕地研究和黃
河水體內頂級物種(魚類)的調查分析基礎上,確定了黃
河不同類型生態保護區的生態保護目標:從流域角度而言,黃
河上游的主要生態保護目標是植被和水源涵養林;中游應以水土保持為主,主要是
恢復和保護植被;下游以保護濕地類型和維持濕地面積為重點,保護生物多樣性和重要鳥類資源。
Article 55 any violator of the provisions of article 19 of this law who fails to follow the planned realigning and leading line to realign river courses and build up construct ion projects for leading the river direction or protecting embankments shall, if the flood control work is affected, be ordered to stop the illegal act, restore to the original state or take other remedies and may be concurrently fined not less than rmb 10, 000 yuan and not more than rmb 100, 000 yuan
第五十五條違反本法第十九條規定,未按照規劃治導線整治
河道和修建控制引導
河水流向、保護堤岸等工程,影響防洪的,責令停止違法行為,
恢復原狀或者採取其他補救措施,可以處一萬元以上十萬元以下的罰款。
In case where violation of requirements in the consent document for planning affects flood control but remedies can be taken, the violator shall be ordered to take remedies within a time limit and may be concurrently fined not less than rmb 10, 000 yuan and not more than rmb 100, 000 yuan
第五十五條違反本法第十九條規定,未按照規劃治導線整治
河道和修建控制引導
河水流向、保護堤岸等工程,影響防洪的,責令停止違法行為,
恢復原狀或者採取其他補救措施,可以處一萬元以上十萬元以下的罰款。
With jilin chagan lake wetland and the western chiefly river flood resources of jilin province as studying the focal point, this research analyzed wetland restoration necessity on making use of floodwater resources, and has put forward the allocation model of chagan lake wetland water resources and the concrete measure of recovering wetland and protesting the wetland water resources
本研究以吉林省查干湖濕地及吉林省西部主要
河流洪水資源為研究重點,分析利用洪水資源
恢復查干湖濕地的必要性和濕地滯洪的重要作用,提出了查干湖濕地水資源配置模型及
恢復濕地和保護濕地水資源的具體措施。
Ecological water demand for restoration of groundwater level in minqin oasis in lower reach of shiyang river
石羊
河下遊民勤綠洲
恢復地下水位生態需水量研究
Your entry fee will help restore fish habitat in the eel river watershed
你的入口費用將幫助在鰻
河分水嶺
恢復魚產地。
Relation of wetland resource restoration and protection countermeasure of national conservation area of yellow river in northern henan province
淺析豫北黃
河故道國家級保護區濕地資源
恢復與保護對策
Depending on how the ground surface is denuded, the feature of the current crustal stress field and rock stress environment can be calculated analyzing the result in this paper : by analyzing the recovering feature of the elastic deformation of the rockmass in unload - stage under various pressures, it has been found there is close relationship between the recovering degree of the elastic deformation of the rockmass and the unloading degree of the pressure the direction of the major principal stress in the crustal stress field is not consistent with the direction of the crushing stress regional tectonics borne during the last tectonic movement. the evolving degree of the regional geomorphology evidently affects the current crustal stress field, which changes from the self - weight stress field to the horizontal stress field, with the changing of the eroding degree of the regional geomorphology ranging from valley area to hilly country to flat country. in valley area, where there is two stress belts, the bankslope s tress belt and the self - weight stress belt within the mountain. the direction of the major principal stress is nearly parallel to the ground surface and inclines towards the valley in the bankslope stress belt. it is nearly vertical in the self - weight stress belt
通過本文的研究成果,根據區域性地貌的演化特徵,我們可以大致地對現今地應力場進行判斷:在分級卸荷條件下,巖體中彈性變形的
恢復具有明顯的規律性,這種規律對于研究地應力場的演變是有幫助的;地應力場中最大主應力方向與區域構造形跡在最近的構造運動中所受區域性擠壓應力的方向無明顯的對應性;區域性地貌形態的演化程度對現今地應力場的特徵具明顯的影響,隨著區域性地貌侵蝕程度由峽谷區、丘陵區、平原區的變化,現今地應力場特徵由自重應力場、水平應力場為主含少量自重應力場特徵向水平應力場的規律變化;在峽谷區,山體中具有兩個應力帶:自重應力帶和卸荷應力帶,最大主應力方向在卸荷應力帶中近平行於坡面並傾向于
河谷、在自重應力帶中近於直立;根據原始地面遭剝蝕的程度,可以大致地估算最大主應力和中間主應力的量值和方向;在丘陵區和平原區,最大主應力的方向近於水平,並與附近區域性侵蝕盆地和
河流的展布方向基本平行,根據原始地面遭剝蝕的程度,可以大致估算其最大主應力的量值;根據區域性地貌形態的特徵來分析工程區的現今地應力場特徵,並進而大致了解巖石的應力環境,這種分析方法得出的結論與許多實際的地應力測試成果基本一致,對于大型水電工程地下廠房和壓力隧洞的設計是有所幫助的。
Regeneration status of mangrove forests in mida creek, kenya : a compromised or secured future
肯尼亞米達
河紅樹林森林
恢復狀況:一個受損害的還是有保障的未來
Vegetation dynamics in the dry valleys of yunnan, china, during the last 150 years : implications for ecological restoration
雲南乾旱
河谷150年來的植被變化研究及其對生態
恢復的意義
The analyzed results are as follows : the late 1960 ' s cutoff of riverbends increased both the runoff amount and the sediment transport amount of the lower reach of jingjiang river, while the sediment deposition decreased in the lkngting lake area ; after the mid 1980 ' s, both the middle reach of yangtze river main stem and the dongting lake occurred a trend of decreasing annual sediment transport as a result of decreasing sediment releasing from the upper reach of yangtze river ; and in the recent 3 years ( 2003 - 2006 ), the three gorges reservoir first impoundment additionally reduced the sediment concentration in the middle reach of yangtze river flow with a long time, so a distance would be quite long for suspended sediment recovery, but the distance for bed - material load of suspended sediment recovery would be quite short
分析結果表明: 20世紀60年代下荊江裁彎后,三口(松滋口、太平口、藕池口)分流分沙減少,下荊江徑流量和輸沙量相應增加,洞庭湖泥沙淤積減少; 80年代中期以後,長江中游幹流及洞庭湖出口的年輸沙量呈減少趨勢,城陵磯至武漢
河段
河床由淤積轉為趨向沖淤平衡;三峽工程初期蓄水運用后,長江中游含沙量沿程
恢復距離較長,但床沙質部分
恢復距離相對較短。
Research on the restoration of the function of huaihe water conservation in xinyang city
信陽市淮
河源水源涵養功能
恢復研究
Angie had just got herself settled under a bush when this elephant family came trundling down the sandy bank, eager to cool off and drink. once in the shallows, they relaxed, and the water settled back to its former glassy stillness
攝影師angie剛在灌木下架好相機,這大象一家就沖下沙堤,泡在水中消暑解渴。當它們在淺灘上安頓下來,
河水又
恢復到原先明凈如鏡的狀態。
The banks of the yongning river in taizhou were renaturalized in connection with the design of the river park, creating additional flood plains ( page 75 )
與永寧公園的設計相結合,本來渠化的永寧江
恢復了自然形態,增加了
河流的行洪灘地。
Because of complex physiognomies and ecological environments, various kinds of wetland develop in sanggan river valley. wetland vegetations in the sanggan river valley, including the floristic diversity of wetland vegetation, the interspecific relationship of plant communities, the relationships between plant communities and environments were studied, respectively
本文以山西桑乾河流域濕地植被為研究對象,對濕地植被的區系多樣性、植物群落的種間關系、植物群落與環境的生態關系以及濕地的退化和恢復等進行了研究。