查询词典 watershed

Aimed at resolving the problems of sensitivity to noise and over-segmentation existing in traditional watershed algorithm, a new image segmentation method-CWAC is presented. First, an image is separated into a large number of small partitions by watershed algorithm and the characteristic parameters are calculated.

针对传统分水岭分割算法对噪声敏感和易于产生过分割问题，提出一种新的基于分水岭和蚁群智能聚类的图像分割方法(CWAC， Combining watersheds and ant colony clustering)。

Due to unique physiographic conditions and profound effects of human activities, Shiyang River Watershed has been facing the serious ecosystems degradation and ecological crisis, and being the typical ecological degradation area of inland watershed in the northwest China.

由于特殊的自然地理条件和不合理的人类活动，生态环境退化，出现了严重的生态危机，成为我国干旱区内陆河流域生态退化的典型和社会各界广泛关注的焦点。

The third part is to study about application cases, which includes Chapter 6 and Chapter 7, and provides examples of building the watershed distributed hydrological model and assessing the watershed water quantity renewability.

4第三篇包括第六章和第七章，是应用实例研究。为黄河流域分布式水文模型的研制和水资源量可再生性的评价提供了范例。

At the same time of changing watershed intrinsic natural relation, people destroyed its crude system. Watershed is faced with more and more serious crisis in water environment and water lack, which result in water quality worsened, more sandiness, reservoir silted.

人类改变流域原有的自然联系的同时，也破坏了流域天然系统，使流域面临着愈演愈烈的水生态环境危机和严重的水资源短缺问题，从而导致流域上游水质恶化，河流含沙量加大，中下游水库淤积严重。

It shows that runoff is closely correlated with the features of individual precipitation, and it is also affected by vegetation within a short period of time. Raindrop erosion, sheet flow erosion and rill erosion on the slope are the main soil erosion patterns; sediment yield occurs mainly in flood season. Human activity and individual precipitation are two important factors that control the soil erosion at a small watershed. Comprehensive management on the slope in a small watershed is an efficient measure of water and soil conservation.

分析表明，小流域的产流方式容易随次降雨条件的变化而变化，植被因素在较小时间尺度内就会影响产流；产沙主要来源于坡面上的溅蚀、片蚀和细沟侵蚀，时间主要集中在汛期；人类活动以及次降雨条件是控制小流域侵蚀产沙的重要因素；在小流域内进行坡面的综合治理是水土保持的有效措施。

By collecting and treating the natural, social and economic conditions as well as other related information based on RS, GIS and other integrated technology. Analyzing the variance and division status of forest productivity, division of forest site, available quantities and natural quality of forest resources in Minjiang watershed. On the above researches, the evaluation was launched to the utilization suitability and adjusting of forest resources, which provided the stagy and technology about reasonably utilizing the forest resources in Minjiang watershed.

本文主要借助遥感和地理信息系统及其它集成技术，收集并处理闽江流域自然条件和社会经济状况以及相关资料信息，对福建省闽江流域森林生产力空间分异及分区状况、森林立地类型的划分、森林资源的可利用数量、自然品质等方面进行专题分析研究，在此基础上对闽江流域森林资源利用的适宜度进行评价和调整，为闽江流域森林资源合理利用提供决策和技术支持。

The wavelet variance verification also indicates that the first main period of the runoff of mountainous watershed in the Shiyang River Basin is 30years, and 22years and l5years are the second and third period respectively; 3 Then we also compared the total runoff of mountain watershed with climate factors of Wushaoling which station is in the mountain headstream area, such as precipitation and temperature, the data record that the correlation coefficient of annual runoff and precipitation variation over the upper reaches in the Shiyang River Basin is 0.61 ,which indicates precipitation is the main water recharge of the runoff.

石羊河流域出山口年径流的周期变化与乌鞘岭站年降水量和年均气温周期基本上都能在同一周期上下浮动，其中出山口年径流量与乌鞘岭山区年降水量相关系数为0.61，说明地表径流量主要是由山区降水补给；年径流量与山区年均气温变化呈0.28的反相关，说明该流域近50年来出山口径流与山区气温呈反比，即径流量随年均气温上升而减少，相关性暂时不十分明显。

In chapter 4, the restoration and rehabilitation technology of multiple functional forest system were studied. Firstly, it was expounded that we should restore and rehabilitate watershed protection forest in source of rivers, in catchment areas of small watersheds and around reservoirs, which includes protecting the present natural forests and planting watershed protection forests in the non-forest land. The main afforestation models comprises "Cupressus funebris + Alnus cremastogyne or Robinia pseudoacacia}","Pinus massoniana + Camellia oleifera (or Robinia pseudoacacia","Populus + Robinia pseudoacacia ", etc.

首先阐述了应在河流源头、小流域集水区和水库周围恢复和重建水源涵养林，这包括保护好现有天然林和在无林地营造水源涵养林，主要林种组合模式有&柏木＋梢木（或刺槐丫'／'马尾松＋油茶&、&杨树＋刺槐&等；其次着重论述了坡地水土保持林体系的重建技术，这包括工业原附、经济林、薪炭林、混农林业和退耕还草还牧等的经营和 A 建设技术；接着简要介绍了林牧业产业化途径。

The objective of this study was to (1) explore the environmental, cultural, and hydrologic characteristics for sustainable development of San-Bu-Keng Creek watershed in Shangan area, Shuili Township, Nantou County,(2) investigate factors of causing debris flow such as terrain, geology, hydrology, land use,(3) evaluate the implemented watershed conservation and management strategies and suggest necessary improvements, and propose suitable land uses for sustainable development.

三廍坑溪集水区遇强度高、总量大的暴雨常发生土石流灾害，常造成下游上安社区发生屋毁人亡之惨剧。1996年贺伯台风、1999年的921地震造成水里上安地区溪流集水区源头裂缝、土层松动、坡地崩坏，其后2001年的桃芝台风暴雨更在三廍坑溪造成土石流灾害，计有死亡失踪17人，田园流失近百公顷，房屋全倒26户、半倒29户。造成灾害的原因包括陡峭地形、松散地质与台风暴雨等自然因子及滥垦滥伐，占用河道等不当土地利用。

Free marketscenario depends on outside system of the watershed,sothis system has more risk than the system of watersheddevelopment.In watershed development scenario,thecropping system and livestock system are balance,thelabour is also balance,so the stability of this systemis better than the system of tree market.

但是如何科学地、合理地规划这些小流域，使之在资源利用上是持续的，在经济上对大多数受益者是可行的，达到既开发利用了小流域内的农业资源，增加了农民的收入，同时又保护小流域内的生态环境，达到生态、经济、社会三大效益的统一，是极待于研究的问题。

Some of them were ligated to the plasmid vector pCR 2.1 andsequenced,respectively.

将所获DNA片段克隆到pCR2.1载体进行测序，并与基因组数据库进行同源性比较。

Thinking since Google owns Blogger, I would be able to escalate this issue to the support team.

自谷歌的思考拥有Blogger的，我将能够缓解这一问题的支持团队。