natural watershed 中文意思是什麼
natural watershed
解釋
天然流域-
The dissertatio n constructs the index system, introduces the coefficients of development, coordination, fairness, and the coefficient of sd, which is composed by the former three and can reflects the sd overall strength of watershed, brings forward the quantative criteria of in order that the research of wrcc is based on the good watershed ecology and environment, the dissertation, according to the ecological appropriate theory, builds the logarithm normal distribution model about the relation between the growth of natural vegetation and the depth of groundwater ; based on this relation model, proposes a quantitative method of ecological water requirement ( ewr ) of natural vegetation in arid area, which utilizes the results of rs technique and the spot testing data of vegetative physiology demand
針對流域特點建立了基於水資源的流域可持續發展評價指標體系，引入發展系數、協調系數、公平系數，以及由其構成的衡量水資源支撐社會可持續發展綜合水平與能力的可持續發展系數，提出了可持續發展的定量判別方法。為保證在良好生態的前提下進行水資源承載能力研究，論文根據生態適宜性理論，建立了乾旱區典型天然植物生長與主要環境因子的偏態單峰對數正態分佈模型。基於此關系模型，利用遙感技術成果以及植物生理需水的現場實驗數據，提出了乾旱區天然植被生態需水量計算方法。 -
The shaluli mountain chain constitutes a natural watershed between the jinsha river
沙魯里山系是金沙江和雅礱江德天然分水嶺。 -
Based on investigation of natural forest vegetation in chaoguanxigou watershed of rocky mountain area of north of china, the composition of species, structure of dbh of trees and species diversity of trees and shrubs in the course of forest succession are researched
摘要基於華北土石山區潮關西溝流域天然森林植被調查的基礎上，對森林植被群落演替中群落樹種組成、胸徑結構和生物多樣性變化進行了研究。 -
As the agricultural nfs is the most important factor for water environmental deterioration and lake eutrophication in china, more and more scientists and technologists focus on the control countermeasurc and pollution mechanism of agricultural non - point source ( nfs ). based on the investigation of natural resource and agricultural distribution, the loss rule of nitrogen and phosphorus in the typical land of qiandao lake watershed and distribution rule of the phytoplankton and physico - chemical characteristic in the lake were studied, and the input loading of nitrogen and phosphorus was also calculated by the annagnps model in this thesis. according to the routine monitoring data of the water environment in qiandao lake from 1989 to 2001, the concentrations of toxic substance and heavy metal were under the monitoring limit, but the total nitrogen ( tn ) and total phosphorus ( tp ) were much higher than the criterion for lake and reservoir
本文調查了千島湖流域的自然資源和農業生產情況，研究了典型坡地降雨徑流中的氮、磷污染物的輸出規律，利用annagnps模型估算流域農業非點源污染物輸入負荷，並在千島湖內設點采樣，對水質理化指標和浮游植物群落進行系統的研究，得出以下結論： 1989 2001年間的水環境常規監測資料統計分析表明，有毒物質和重金屬濃度長期在監測下限內， no _ 2 - n 、 no _ 3 - n 、 nh _ 3 - n年平均濃度均符合類標準，但湖泊水庫特定項目tn和tp濃度分別為超類和類，呈嚴重超標狀況，湖區主要污染因子是將導致富營養化的物質tn和tp 。 -
In this paper, an algorithm based on watershed transformation and fuzzy logical catchment basins combination is proposed to suppress or remove the feature of natural background, and applied to infrared object boundary detection and labeling
文中在分水嶺演算法的基礎上，結合模糊邏輯方法，對自然背景下的紅外人工目標的邊界檢測和分割以及紅外背景的抑制進行了探討。 -
Mountainous small watershed is a natural catchments as well as a complex system out of the sub - system of ecology, economy and society
山區小流域是以分水嶺和出口斷面為界形成的自然集水單元，是具有一定水文學特徵的自然、社會和經濟綜合體。 -
Yet the zone along yellow river in shandong is one of the main territory in which produce cotton and grain. yellow river cross the whole territory and constitute the natural watershed of the district
而山東沿黃地帶是山東省主要糧棉產區之一，黃河縱貫全區，構成區內地上、地下天然分水嶺，水資源豐富。 -
Faustmann - hartman forest resource model of economic and environmental benefits has been selected to study the economic compensation issues on environmental benefits, economic incentives are used to encourage the owners or / and managers of watershed forest resources to manage their forests for natural preservation, in the meantime, all stakeholders - the owners, managers, policy - decision - makers, investors and beneficiaries and losers will learn the opportunities and constraints of watershed forest resource management. the research will be meaningful to decision - making for compensation fee institution for environmental benefits
本研究應用綜合考慮經濟效益與環境效益的faustmann - hartman森林資源模型，研究水源涵養林環境效益的經濟補償問題，以創建經濟激勵機制促進水源涵養林所有者或經營者採取有益於自然保護的生產經營方式，並促進各利益相關者? ?水源涵養林所有者、經營者、政策制定者、投資者、水源涵養林環境服務的受益者、和環境退化的受損失者等了解投資於水源涵養林環境服務的機會與問題，同時也為我國森林環境效益補償制度的制定和實施提供決策依據，只有重要的理論和現實意義。 -
According to natural conditions of the area, natural rules and systematic engineering principle, a series of countermeasures were propased such as improving forest cover degree, enhancing water conservancy project, adjusting agricultural production constitution, combining engineering measures with ecological measures to restore mine ecosystem and to take comprehensive measures to control soil erosion so as to improve ecological environmental quality in watershed between the yangtze river and the huaihe river
針對研究區域的自然環境條件和社會經濟狀況，按照系統工程的原理，從遵守自然規律的角度出發提出了提高森林覆蓋率，加強水利工程建設，改良土壤，因地制宜調整農業產業結構，工程措施與生物措施相結合進行礦山修復，治理水土流失，搞好生態環境保護規劃，大力發展生態旅遊，提高公眾的環境意識，依靠科技進步促進地方經濟發展的一系列改善江淮分水嶺地區生態環境問題的對策。 -
Founded in 1992, the center for watershed protection is a non - profit 501 ( c ) 3 corporation that provides local governments, activists, and watershed organizations around the country with the technical tools for protecting some of the nation ' s most precious natural resources : streams, lakes and rivers
描述:美國流域保護中心成立於1992年，是一個非盈利團體，為當地政府及其他流域保護組織提供技術方法，以保護國家珍貴的自然資源，如江河、湖泊等。 -
Based on the investigation of the social economy and natural environment of qian county experiment area, summarizing research results of personnel of the task group, with the main methods of gis and the technology of objected programming, combing with my principium research on theory and application of watershed spatial database, attribute database and land evaluation, studied the establish technology on regional land resource information database ; exploited the land resource dynamic monitoring information that is applicable to qian county experiment area ; and used the information system as the basic data resource on the application research of land resource dynamic monitoring and evalution
本文在調查研究乾縣試區社會經濟及自然狀況的基礎上，綜合試區課題組現有的研究成果，以地理信息系統和面向對象的編程技術為主要手段，結合本人在流域空間數據庫、屬性數據庫、土地評價等理論和應用方面所作的初步探討工作，研究了區域土地資源信息數據庫的構建技術；開發了適用於乾縣試區的土地資源動態監測信息系統；以信息系統為基礎數據源，對土地資源動態監測和評價作了應用研究。
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