河流断面

该模式以BOD5总量为控制对象，任一河流断面的BOD5输入量在此响应矩阵中仅出现一次，从而使响应关系由下三角矩阵改变为每一行均含三个变量的稀疏矩阵。

Based upon total load control , a BOD5 input to any river reach appears in the response matrix only once which changes the response from a lower triangular matrix to a sparse matrix in which any single row has three variables .

枯水期六个河流断面有机污染物调查分析

Investigation and Analysis of Organic Pollutants in six river segments during dry season

划分河流断面并设定相应的生态环境功能，设计段首控制法和段末控制法；

Designating the cross sections of river and setting their corresponding ecological environmental function ;

所有单一河流断面处的含沙量通过单一河流悬沙输运的求解方法获得。

A numerical model for simulating unsteady flow and suspended sediment transport in river networks was presented .

本文针对区域多级河流断面的水质评价和综合评价问题，提出一种灰关联分析的评价方法。

In view of the problem of water quality assessment for both individual index and muitiple in-dexes in a nver system or a region .

此外，在系统中还构建了湿地水文过程模拟模块，将湿地径流、降雨过程和河流断面进行可视化，为湿地洪水预测提供了辅助信息。

Also , the system has produced wetland hydrology process unreal module , it may simulate wetland runoff and raining process , provide auxiliary information for wetland flood management .

通过对有毒物质事故泄漏行为的数学模拟分析，提出了一种计算有毒物质河流断面超标风险率的方法。

In this paper a method for calculating risk of exceeding criterion ( REC ) was provided by means of mathematical simulation analysis ( MSA ) for toxicants ' leaking accidently leading to pollution in the river .

本研究以9种酚类污染物为研究对象，通过河流断面调查、实验模拟和数值模拟研究松花江酚类污染物的时空分布和迁移转化过程。

We selected nine kinds of phenolic pollutants conducted the monitoring of river section , laboratory experiments and numeric simulation to examine the characteristics of spatial-temporal distribution and the transformation-transportation processes of these pollutants in the aquatic environment .

对河流断面的监控是评估控制断面以上流域内污染物排放总量的重要手段；污染源监控则是评估污染源排放情况、核定排污许可证实施效果的基础。

The river section monitoring is an important means to assess pollutant discharge load in the upper watershed ; and pollution source monitoring is the basis to assess the enterprise discharge load and to evaluate the implementation results of the Pollutant Discharge Permission System .

本研究将在河流断面不同水期水质常年监测的基础上，经过实验确定不同流域的水质模型参数，最终确定出流域内水环境容量，提出各区域水环境总量控制目标。

Based on the long-term monitor of the different period and different water quality in Inner Mongolia section of Yellow river , according to the final water environmental capacity of different water quality model coefficient , it puts forward the targets of the water environment total amount control .

得到了两种水文条件下的河流各断面的COD浓度分布。

Also , the COD consistency distributions of various sections of the rivers in two hydrology conditions have been got .

以COD为控制指标，根据逆推法的河流水环境容量模式，计算了污水达标排放情况下的污水允许排放量，从而对河流控制断面指定的标准功能进行了可达性分析。

Using COD as control index , according to the river water environmental capacity model of converse inference method , this paper calculated the permited discharge capacity of the standard reached wastewater ; and analysised the appointed standard functional achievability of the river controlled sections .

根据广东境内主要河流控制断面20个站点1956~2000年逐月径流资料，采用PPCC检验法对其月枯水径流的五种理论分布模式进行对比分析。

Based on the description of the concept of the low flow and low-flow discharges , the Probability Plot Correlation Coefficient ( PPCC ) method is used to test the probability distribution of monthly low flow at twenty stations in Guangdong Province .

水质模型在排污总量控制区河流出境断面水质评价中的应用

The application of water model in water quality assessment of river boundary section in the total waste load control areas

评价指标环湖主要河流达标断面主要交界水体达标断面总体达标断面

Assessment Indicators Sections of Key Rivers Surrounding the Lake Attaining Standards Key Sections at Border Attaining Standards Overall Sections Attaining Standards

水质分段法优化河流监测断面及其在水功能区达标监测中的应用

The measure of water quality subsection in optimizing river monitoring section planes and applying to achieving standard monitoring in water function area

提出水质分段优化河流水质断面的原则和水质突变点确定的方法，将优化后省级尺度的监测断面直接用于地表水环境功能区达标监测，取得良好的环境效益和社会效益。

This article brings forword the principle of water quality subsection in optimizing river monitoring section planes and the method of confirming water quality breaking spots . The optimized monitoring section planes were used to monitor in surface water function area and obtained favorable environment benefits and society benefits .

即使以1995年污水排放量衡量，污水达标排放时，枯水期图们江干流等5条河流控制断面水质也达不到指定功能水质标准，已无环境容量可利用。

Even judged by wastewater discharge quantity in 1995 , during the less water period , the water quality of the five rivers controlling sections of the mainstream of the Tumen River did not reach the appointed functional water quality standards and there was no environmental capacity to use .

河流水质监测断面优化布设方法研究

An approach to optimizing the layout of water quality monitoring sections in river

广东省跨市河流边界水质控制断面方案讨论

Discussion about optimization arrangement for water quality monitoring points of multi-city rivers in Guangdong province

只要测量河流中相邻三断面的水位变化过程，就能用这种方法反算出河流的区间入流过程，文中给出了计算实例。

As long as the variations of three adjacent sectional levels are known , the local inflow of the river can be computed out by using this method .

在地理学中，流域指相对河流的某一断面，由分水线包围的区域，是水资源地面集水区和地下集水区的总称。

In the geography , the river basin points out relative river some sections ? through the dividing line encirclement area , it is the district general designation the catchment area including the water resources in the subterranean and the surface of the earth .

通过对河流时段通量所采用的估算方法的误差比较分析，说明了实测河流断面时段通量中时间平均离散通量的贡献；

Based on the error comparison and analysis of the estimation methods of the river period fluxes , the contributions of the time-averaged dispersion fluxes to the measured period fluxes of river cross sections are discussed .

提出了河流环境关心点的概念，即指河流两岸或河中体现或影响河流环境功能的环境要素与河流某断面相互作用的点。

The concept of river 's environmental concerned point , the interaction point between a river and environmental elements which implied or effect the river 's function around the river or in the river , is suggested .

根据河流地表水中的有机污染物的浓度和影响其浓度的主要因素之间存在的已有映射作用关系，利用对一河流断面的实际监测数据，以采用BP算法的人工神经网络方法建立网络模型。

Based on the existent mapped relation between concentration of organic pollutants and mostly factors of affecting concentration of surface river water , used in practical monitoring data of a river cross section , a network model of artificial neural network of BP arithmetic was established .

本文采用河流二维数值模拟的方法，通过CFD软件对污染物COD在河流中的迁移、扩散及降解过程进行模拟，模拟新增断面的COD浓度，并采用单因子评价方法来评价河流新增断面的水质。

This paper adopted two-dimensional numerical simulation method in the river , through the CFD software simulated the migration , diffusion and degradation processes of the pollutant COD in the river , using single-factor evaluation method to assess the water quality of the new cross-section .