desertification 中文意思是什麼

The remote sensing quantitative retrieval model for the appraisable factors of desertification monitoring are founded. in naiman country, inner mongolia, the experimental area, the hyperspectral imaging spectrometer data in plant growth seasons are collected by state - produced airborne hyperspectral imaging spectrometer omis - i, and the etm + image is also obtained. meanwhile, ground investigation and measurement are made, which include the measurement on reflection feature of different kinds of geo - targets and the ground investigation data necessary for spectral rebuilding and retrieval models of the appraisable factors of desertification monitoring

本研究以內蒙古奈曼旗作為研究試驗區，採用我國自行研製的機載高光譜成像光譜儀omis - ，在植被生長季節取得高光譜解析度成像光譜儀數據和etm ~ +圖像，並進行了同步的地面調查及量測，包括不同類型地物反射特性量測和光譜重建以及荒漠化監測評價因子定量反演模型所必需的地面樣方調查數據。

And understanding and studying the spectral features and variation rules of geo - targets in the experimental area, raising that it is the basis of geo - targets information collection with imaging spectrometer data to understand spectral features and variation rules of geo - targets, realizing that in a great extent spectral - integrated - form - based classification method can remove the phenomenon of " different spectrum with same objects " resulted from reflection ratio curve translation because of the angle change among sensor, targets and observation direction, and the average and variance images can be introduced to solve the problem of two kinds of geo - target with similar spectral forms and much different values of whole reflection ratio. it is suggested that " red edge " range bands of vegetation, which has close relationship with vegetation cover and biomass, is the main characteristic bands and important basis for careful vegetation classification and quantitative retrieval, and pixel - based derivative spectral analysis is very useful for removing the effects of soil background values and quantitatively retrieving vegetation biomass and cover. the remote sense quantitative retrieval model is developed for main appraisable factors of desertification monitoring assessment with imaging spectrometer data and then the applicability of model is analyzed

研究結果如下：首先針對荒漠化地區的地物特徵，對高光譜數據不同波段的數據質量、波段組合進行了評價，提出了適用於荒漠化監測的基本波段選擇集；初步了解和掌握了研究地區的地物光譜特性及變異規律，進一步明確了掌握地物光譜特徵和變異規律是用成像光譜儀數據提取地物信息的基礎；發現了基於光譜整體形狀的分類方法在很大程度上能夠消除由於傳感器、地物目標觀測方向之間的角度變化引起的反射率曲線整體平移的「同物異譜」現象，對于譜形相似而整體反射率的值相差較大的兩類地物，通過引入均值和方差圖像參與分類得到解決；研究還表明在植被「紅邊」范圍內的波段是進行荒漠化監測的主要特徵波段，這些波段與植被生物量和蓋度都有密切的關系，是開展精細植被分類研究和植被定量反演的重要基礎；像元的導數光譜分析可以消除土壤背景的影響，是進行植被生物量和蓋度定量反演的有力工具；建立了荒漠化監測主要評價因子的定量反演模型，並分析了模型的適用性。

Grassland degradation, desertification, basification pose great threat on ecological balance. slow development of grassland husbandry cause imbalance in our agricultural structure

草地退化、沙化、鹽堿化對生態平衡造成嚴重威脅，草地畜牧業滯后使農業結構失衡。

Based on field research and the dynamic analysis of remote sensing data of different time ( 1987 tm, 1996 tm and 2000 china - brazil earth resource satellite ccd ), using multi - information of research area ( including data of geology, geography, hydrology, meteorology, economy, human culture and dem ) and existing research results, the dissertation discusses drive factors of desertification and the relationships between drive factors and desertification with the help of gis tool and some mathematical methods such as probability, statistics, curvilinear estimation, logical analysis and analytic hierarchy process

論文在對研究區土地荒漠化現狀野外調研和不同時相（ 1987tm 、 1996tm和2000ccd ）遙感圖像土地荒漠化信息提取和演變分析的基礎上，結合研究區已有的多元信息基礎資料及研究成果（包括地質、地理、多時期的水文氣象、經濟、人文以及dem數據等） ，運用gis強大的空間分析功能和概率統計、曲線估計、邏輯分析、主成分分析、層次分析等數學方法綜合研究了土地荒漠化與各驅動因子之間的相關關系，揭示了研究區土地荒漠化的主要驅動因素，探討了荒漠化動態演化規律。

Dealing with remote sensing data of different time ( 1987, 1996 landsat tm, and 2000 china - brazil earth resource satellite ccd ) and using the gis technology, the dissertation extracts the changing information of the desertification. the dissertation makes a dynamic remote sensing analysis on the desertification of the research region, and discusses the temporal and spatial evolving law of the desertification

在技術上主要採用了1987 、 1996年的陸地衛星tm數據以及2000年中巴資源衛星1號ccd數據三個不同時相的遙感數據進行圖像處理，並利用gis較強的空間分析功能，從中提取研究區土地沙漠化的變化信息，同時與研究區的其他信息數據進行疊加分析，探討了研究區土地沙漠化的時空演化特點。

The ecosystem service functions of gansu is analyzed from six facts, such as grassplot ecosystem, forest ecosystem, watershed ecosystem, farmland ecosystem, desertification ecosystem and city ecosystem. this thesis simulates a latent ecosystem using vegetation type map to explain preferably how landscape pattern impacts the service function of ecosystem. the unit price of every service function is known by annual average value schedule of global ecosystem service function

為了更好地說明景觀格局變化對生態系統服務功能的影響，通過植被類型圖模擬了潛在生態系統，根據全球生態系統服務功能的年平均價值一覽表查得各服務功能單價值，將其服務功能價值進行計算並與現實生態系統服務功能價值進行比較得出：由於現實生態系統人為的干擾作用，使得生態系統服務功能價值降低了1022 . 85 10 ~ 6美元。

( 2 ) region is mainly made up of large patches which are distributed collectively. region landscape is mainly made up of the hill grassplot landscape of mountainous region and desertification landscape. ( 3 ) with the enhancement of human beings effect, landscape diversity indexes are declined, landscape evenness indexes are reduced, and landscape fragmentations are intensified

通過這些指數的分析表明：甘肅省以草地景觀為主，斑塊數較多，大小斑塊間差異較大，斑塊形狀較復雜，自相似程度較低，區域總構形較復雜；區域總構形以大斑塊為主體，呈聚集型分佈，構成景觀主體的是山地丘陵草地景觀和裸地景觀；隨著人類干擾強度增加，景觀多樣性下降，均勻度降低，景觀破碎化程度加深。

There is great desertification in the east of hainan island of china due to over - mining of ilmenites

摘要多年來，由於對鈦礦的無序開采，使得海南島東部出現大面積的土地荒漠化。

The operation covered a vast area, and the relief team worked round the clock in temperatures as high as 54 c 129o f. the volunteers went to many towns and villages, including pali, jaisalmer, jodhpur and barmer where is severely affected by desertification

發放區域涵蓋甚廣，賑災人員在攝氏五十四度高溫的環境下，日以繼夜地工作，足跡遍及久德浦jodhpur帕里pali沙默jaisalmer和沙漠化特別嚴重的巴莫barmer等四省。

The thesis starts with chinese desertification prevention and cure lav per se and the problems in the relationship of desertification prevention and cure law, water and soil maintenance law, grassland law, forest law, soil administration law and environment protection law, searching out the limitation of chinese desert prevention and cure jurisprudence

本文針對我國《防沙治沙法》本身以及協調《防沙治沙法》和《水土保持法》 、 《草原法》 、 《森林法》 、 《土地管理法》 、 《環境保護法》等法的關系中存在的問題入手，尋找到我國防沙治沙法律體系中存在的缺陷。

Wind erosion - induced desertification not only influence the agricultural production of the region. but also threaten the entironmental quality of the leeward region

風蝕沙化不但影響風蝕地區農業生產，也威脅著下風地區環境安全。

Abstract : the preventing and remedying desertification puts into practice prevention as main, principle of combining ecology protection with prevensing and remedying, principle of preventing and remedy and economy development and utilization coodinated and promoting, comprehensive preventing and remedying and chassified control combines, public particlpation and renovating person benifits combine for different responsibility body bearing different responsibility bearing principle, becanse of man - made fault causing desartification preventing and remedying responsibility carrying out action - person bearing principle, principle of gorernment mainly bearing desertification recovery caused by nature action and benifit ' s person undertaking reasonable burban and decide unified planing system, systen of desertification status investigation and monitoring early warning system, fallow, limited cultivating hand and help - the poor combined systen, prohibitory systan, priority region and urgent - action region system

文摘:沙漠化防治實行預防為主，生態保護與防治結合原則，防治與經濟開發利用相協調促進原則；綜合防治與分類控制相結合；公眾參與和整治者受益結合；對不同責任主體實行不同責任承擔原則，由人為不當活動造成的沙漠化治理責任，實行行為者負擔原則；對自然作用造成的沙漠化治理實行政府負擔為主，受益者合理負擔原則；確立統一規劃制度；沙漠化狀況調查評估與監測預警制度，休耕限耕和扶貧結合制度，禁限制度，優先區域與緊急行動區域制度。

The preventing and remedying desertification puts into practice prevention as main, principle of combining ecology protection with prevensing and remedying, principle of preventing and remedy and economy development and utilization coodinated and promoting, comprehensive preventing and remedying and chassified control combines, public particlpation and renovating person benifits combine for different responsibility body bearing different responsibility bearing principle, becanse of man - made fault causing desartification preventing and remedying responsibility carrying out action - person bearing principle, principle of gorernment mainly bearing desertification recovery caused by nature action and benifit ' s person undertaking reasonable burban and decide unified planing system, systen of desertification status investigation and monitoring early warning system, fallow, limited cultivating hand and help - the poor combined systen, prohibitory systan, priority region and urgent - action region system

沙漠化防治實行預防為主，生態保護與防治結合原則，防治與經濟開發利用相協調促進原則；綜合防治與分類控制相結合；公眾參與和整治者受益結合；對不同責任主體實行不同責任承擔原則，由人為不當活動造成的沙漠化治理責任，實行行為者負擔原則；對自然作用造成的沙漠化治理實行政府負擔為主，受益者合理負擔原則；確立統一規劃制度；沙漠化狀況調查評估與監測預警制度，休耕限耕和扶貧結合制度，禁限制度，優先區域與緊急行動區域制度。

Reasonless economic activities of human beings, such as over - reclamation, overgrazing, denudation, misuse and gouging, trigger and accelerate land desertification, which are only the exterior causes of land desertification

摘要人類不合理的經濟活動，如濫墾、濫牧、濫采、濫伐、濫用等觸發並加速了土地荒漠化的進程，但這只是制約土地荒漠化的外在機制。

Moderate and rotational grazing can do some good to the development of leymus secalimus population, and ca n ' t result in desertification in grassland

適度的輪牧可促進賴草種群的發育，增加植被蓋度，不會導致荒漠化。

4. the driving cause of the formation and change of land desertification in keerqin sandlot is analyzed from the nature and society aspects based on field investigation and former research

本研究在野外調查和總結前人研究成果的基礎上，從自然條件和社會因素兩個方面總結分析了科爾沁地區土地沙漠化形成和變化的動因。

The paper is mainly based on geography, ecology, sight ecology, region location theory and system theory. by interpreting the mss remote sensing image of 1970s and the tm remote sensing image of 1980s and the end of 1990s in keerqin sandlot based on background database and expert information, we have achieved the three periods vector data of land desertification of the research area, then we have disposed the data property by using the powerful spatial analysis function of arc / info and achieved the information extraction and analysis supported by arcview and erdas imagine. thus the rule of temporal and spatial variation of land desertification in keerqin sandlot is researched and the blueprint and countermeasures of the prevention and treatment of land desertification in keerqin sandlot are put forward

本研究主要以地理學、生態學、景觀生態學、區位論和系統論為主要理論支持，通過對科爾沁地區20世紀70年代的mss遙感影像、 20世紀80年代和90年代末tm遙感影像進行基於背景數據庫和專家知識的解譯，獲得科爾沁研究區土地沙漠化的三期矢量數據，利用arc / info軟體強大的空間分析功能對屬性進行處理，並在arcview 、 erdasimagine軟體的支持下進行信息提取與分析，研究了科爾沁沙地土地沙漠化時空變化的規律，提出了科爾沁沙地土地沙漠化防治的構想與對策。

The overall temporal variation characteristics of land desertification in the recent 30 years in keerqin sandlot are that : the main types of land desertification are changed from medium and severest desertification types to gently and medium desertification types. the area of gently desertification land is increasing. the area of severe desertification is decreasing

研究表明： 30年來，科爾沁沙地土地沙漠化的時間變化總特點是：土地沙漠化的類型中度、極重度為主轉變為以輕度、中度為主，輕度沙漠化土地的面積呈增加趨勢，重度沙漠化土地的面積減少趨勢。

3 analyzing particle size of the wind - blown sediment and surface soil indicate that the former in 0. 02mm - 0. 2mm occupy about 40 % and 55 % of sloping field and shoaly land of bashang, which shows that bashang is the erosion and desertification region or the latency. 4 the search of decreasing effect of wood strap indicates that in lower wind speed the effect is distinct

3風蝕物及表層土壤顆粒粒徑分析表明，地表200cm高度內風蝕物粒徑在0 . 02mm 0 . 2mm之間；壩上地區坡梁地與灘地該粒徑范圍顆粒分別佔40和55左右，說明壩上地區是風蝕沙化或潛在風蝕沙化地區。

The harms of sandy desertification in farming, stock raising, traffic, communication, water conservancy facilities and the health of human have been summarized in this paper, and some measures and proposal on combating sandy desertification have been put forward

總結了沙漠化對農牧業、交通、水利、通信以及人類健康等的危害，提出防治壩上地區沙漠化的對策建議。