搜索结果: 121-135 共查到“知识库 水资源保护”相关记录542条 . 查询时间(1.797 秒)
Stream water quality associated with a livestock/poultry production operation in Southeastern Manitoba, Canada
coliform bacteria livestock nitrogen phosphorus stream water quality
2015/3/5
Water quality was examined in two parallel streams in southeastern Manitoba that enclosed a small hog and poultry operation with associated waste lagoons and manure spread fields. Nitrate-N (NN), moly...
基于多层次模糊综合评价模型的喀斯特地区水资源承载力研究
水资源承载力 喀斯特地区 多层次模糊综合评价模型 贵阳市
2016/12/21
研究影响水资源系统承载力变化的关键因素,为贵阳市水资源的可持续利用及合理管理政策的制定提供决策依据. [方法] 以贵阳市为例,将水资源系统分为水资源、生态环境、社会经济3个子系统,选取评价指标,建立多层次模糊综合评价模型对该市水资源承载力进行评价. [结果] 整体上,2003—2013年贵阳市水资源承载力状况不断提高,可较好地支持贵阳市社会经济发展.其中水资源子系统指数处于波动缓慢下降状态,生态环...
Reverse flow injection analysis of trace amounts of anionic surfactants in seawater without liquid–liquid extraction
anionic surfactants reverse flow injection analysis seawater spectrophotometry
2015/3/3
In order to control the pollution by anionic surfactants in seawater, a simple, accurate and sensitive reverse flow injection (rFIA) spectrophotometric method for the determination of anionic surfacta...
Evaluation of uniformity coefficients for sprinkler irrigation systems under different field conditions in Kurdistan Province (Northwest of Iran)
coefficient of uniformity Christiansen equation Iran solid set sprinkler irrigation
2015/3/2
In the past few decades, several coefficients of uniformity were developed to express the uniformity of water distribution for different sprinkler irrigation systems. Christiansen's uniformity coeffic...
Surface irrigation management in relation to water infiltration and distribution in soils
grape yield infiltration parameters irrigation evaluation linear distribution soil water storage surface irrigation (furrow/border) water use efficiency
2015/3/2
Water infiltration and storage under surface irrigation are evaluated, based on the initial soil water content and inflow rate as well as on the irrigation parameters and efficiencies. For that purpos...
The real-time stochastic flow forecast
discharge forecast flow hydrological model Monte Carlo operative hydrological forecast rainfall-runoff model stochastic
2015/3/2
In the Czech Republic, deterministic flow forecasts with the lead time of 48 hours, calculated by rainfall-runoff models for basins of a size of several hundreds to thousands square kilometers, are no...
Long-term Effect of Forest Renewal on the Water Regime in the Small Experimental Watershed Červík
forest hydrology experimental watershed accelerated forest renewal
2015/3/1
The small, fully forested watershed červík (Ce) is situated in the part of the Beskydy Mts called the
Zadní hory Mts since november 1953, water balance has been measured in this place with the ...
The Comparison of Water and Matter Flows in Three Small Catchments in the Šumava Mountains
water cycle runoff water chemistry matter discharge
2015/3/1
The comparisons of water and matter flows have been evaluated in three small catchments with different land uses in the Šumava Mountains in the south-west of the Czech Republic since 1999. The ca...
The Influence of Temporal Rainfall Distribution in the Flood Runoff Modelling
flood hyetograph ensemble simulation
2015/3/1
The rainfall input is one of the main factors influencing the magnitude of the runoff response during
a flood event.Its temporal and spatial distribution significantly contributes to the formation o...
Time Variations of Rainfall Erosivity Factor in the Czech Republic
water erosion rainfall erosivity factor
2015/3/1
The ombrographic data have been selected from 24 meteorological stations of the Czech Hydro Meteorological Institute (CHMI), according to the terms of the Universal Soil Loss Equation for calculating ...
Meteorological Situations in 2007 and their Implications for the Cycling of Selected Chemical Elements in a Central Bohemian Forested Catchment
precipitation forested catchment elements mass balances
2015/3/1
Comparison of the annual bulk precipitation in the Lesní potok experimental catchment (Central Bohemia,
Czech Republic) in the hydrological year 2007 (758.8 mm) with the average annual value between...
柴达木盆地水资源供需配置规划
柴达木盆地 水资源 二次供需平衡 配置
2015/9/16
柴达木盆地气候干旱,水资源紧缺,如何合理配置盆地内的水资源是解决水资源供需矛盾的一个关键。在对
柴达木盆地水资源利用现状分析的基础上,依据水资源分区单元间的径流联系,建立水资源系统网络模型,采用了
长系列方法对规划水平年的柴达木盆地水资源供需平衡进行模拟。通过二次供需平衡调控,实现了不同行业供水
所要求的保证率条件下的供需平衡,给出了规划水平年水资源供需配置方案。
选取氨氮和高锰酸盐指数作为双指标,采用测次法对江苏省淮河流域2012年的水功能区达标情况进行了评
价。结果表明,湖泊型水功能区达标率远高于河流型水功能区;地区之间达标率差异较大,徐州地区达标率较低。
根据水功能区现状入河排污量和纳污能力,提出了规划水平年(2020年、2030年)纳污红线的限制排污总量分别为:
2020年COD4.35万t,氨氮0.43万t;2030年COD3.20万t,氨氮...
Evaluation of management-dependent changes in the water regime of extensive grasslands
grasslands extensive management mulching water regime actual evapotranspiration protection of water resources lysimeters
2015/2/3
The origin of the differences in the water regime components of 0–0.6 m soil profile was identified in extensively managed permanent grasslands (PG, variants: once cut – 1C, twice cut – 2C, nocut – NC...
Drainage Systems and their Water Management Function with regard to Probable Climatic and Hydrological Changes
drainage systems climatic change water discharge controlled drainage double-function control systems farming conditions
2015/1/28
In case that the climatic or farming conditions have changed in a region, it is possible to anticipate that the core parameters of drainage constructions will not be adequate for the current needs. So...