downflow

简明释义

英[ˈdaʊnˌfləʊ]美[ˈdaʊnfloʊ]

n. 向下流之物；向下流

英英释义

单词用法

同义词

反义词

例句

1.This paper describes an experimental and theoretical research on the two-phase flow pattern transition of downflow in vertical helical coils in an air-water loop.

本文对低压水-空气两相流动在立式螺旋管内向下流动的流型及其转变特性进行了实验和理论研究。

2.At the same flow rate the concentrations of ozone in upflow are higher than that in downflow at the same HRT.

在相同水流量条件下，水由下向上流时水中臭氧浓度，高于由上向下流时相同水力停留时间时的臭氧浓度。

3.The water quality evolvement process in Yangtze River drainage area is believed as a complex network system, with having lots of nodes and correlating to the downflow.

长江流域水质演变过程可看成是一个具有多节点，向下流关联的复杂网络系统。

4.The characteristics of boiling heat transfer of steam - water two - phase downflow and up-flow in vertical tube are theoretically and experimentally studies in this paper.

对垂直管内汽水两相下降流动和上升流动时的沸腾传热特性进行了理论和试验研究。

5.After the cracking reaction in downflow reactor, reaction products are separated and spent catalyst is directed to stripping and regeneration sections.

在下流式反应器内的裂化反应之后，分离反应产物，并将废催化剂引导到汽提与再生部分。

6.Methods Porous ceramics were used as immobilization carrier. Optimum conditions for nitrate-nitrogen removal of downflow fixed-bed bioreactor were studied.

方法采用多孔陶粒作反硝化细菌固定化载体，研究下流式固定床生物反应器的适宜脱氮条件；

7.The pulse flow is induced in a downflow boiling point reactor by vaporization of a portion of the liquid feed at proper conditions.

通过在适当条件下汽化一部分液体进料在下流式沸点反应器中引发脉冲流动。

8.To reduce the heavy load on dust collectors upflow beds were soon replaced by downflow fluidized beds.

为了减轻粉尘收集器的负荷，上流式流化床不久被下流式流化床所取代。

9.To reduce the heavy load on dust collectors, upflow beds were soon replaced by downflow fluidized beds.

为了减轻粉尘收集器的负荷，上流式流化床不久被下流式流化床所取代。

10.The characteristics of boiling heat transfer of steam - water two - phase downflow and up-flow in vertical tube are theoretically and experimentally studies in this paper.

对垂直管内汽水两相下降流动和上升流动时的沸腾传热特性进行了理论和试验研究。

11.The engineer analyzed the downflow 下流 patterns to improve the irrigation system.

工程师分析了下流模式，以改善灌溉系统。

12.During the storm, the downflow 下流 of water caused several areas to flood.

在暴风雨期间，水的下流导致几个地区发生洪水。

13.In geological studies, understanding the downflow 下流 of groundwater is crucial for water resource management.

在地质研究中，理解地下水的下流对水资源管理至关重要。

14.The river experienced a significant increase in its downflow 下流 after the heavy rains.

经过大雨后，河流的下流显著增加。

15.The factory's waste management system was designed to minimize downflow 下流 contamination in local waterways.

工厂的废物管理系统旨在最小化对当地水道的下流污染。

作文

In the study of hydrology, the term downflow refers to the movement of water or other fluids downward through a medium, such as soil or rock. This process is crucial for understanding how water interacts with the environment and how it affects ecosystems. The concept of downflow can be observed in various natural settings, including rivers, groundwater systems, and even in urban areas where stormwater management is essential. Understanding downflow is vital for several reasons. Firstly, it plays a significant role in the water cycle. When precipitation falls, some of it infiltrates into the ground, moving downward through the soil layers. This movement is known as downflow, and it replenishes groundwater supplies, which are critical for drinking water and irrigation. Without this natural filtration process, contaminants could easily enter our water supply, leading to health risks. Secondly, downflow impacts the distribution of nutrients in the soil. As water moves downward, it carries essential minerals and organic matter that plants need to thrive. This downward movement helps to leach nutrients from the upper layers of soil and redistribute them deeper, ensuring that even the roots of deep-rooted plants have access to these vital resources. Therefore, understanding downflow is not just an academic exercise; it has real-world implications for agriculture and food security.Moreover, the concept of downflow is also applicable in engineering and environmental management. For instance, in designing drainage systems, engineers must consider how water will flow down through various materials. Proper planning can prevent flooding and erosion, protecting infrastructure and natural habitats. In urban environments, managing downflow is crucial for preventing pollution from entering waterways. By creating green spaces and permeable surfaces, cities can enhance the natural downflow process, allowing rainwater to be absorbed rather than running off into storm drains.Additionally, the study of downflow can provide insights into climate change. As weather patterns shift, the intensity and frequency of rainfall can change, affecting how water moves through the landscape. Understanding these changes allows scientists and policymakers to develop strategies for water conservation and management, ensuring that communities remain resilient in the face of environmental challenges.In conclusion, the term downflow encompasses a vital process in both natural and engineered systems. Its implications reach far beyond the simple movement of water; it influences everything from ecosystem health to agricultural productivity and urban planning. As we continue to grapple with the effects of climate change and urbanization, a comprehensive understanding of downflow will be essential for sustainable development and resource management. By appreciating the importance of this concept, we can work towards creating a more balanced relationship with our environment, ensuring that future generations can enjoy clean water and healthy ecosystems.

在水文学研究中，术语downflow指的是水或其他流体通过介质（如土壤或岩石）向下移动的过程。这个过程对于理解水如何与环境互动以及如何影响生态系统至关重要。downflow的概念可在各种自然环境中观察到，包括河流、地下水系统，甚至城市地区，在这些地方，雨水管理至关重要。理解downflow是非常重要的，首先，它在水循环中扮演着重要角色。当降水落下时，其中一部分会渗入地下，向下穿透土壤层。这种运动被称为downflow，它补充了地下水供应，这对饮用水和灌溉至关重要。如果没有这一自然过滤过程，污染物可能会轻易进入我们的水源，从而导致健康风险。其次，downflow影响土壤中养分的分布。当水向下移动时，它携带植物生长所需的重要矿物质和有机物。这种向下的运动帮助从土壤的上层淋洗养分，并将其重新分配到更深处，确保即使是深根植物的根系也能获得这些重要资源。因此，理解downflow不仅仅是学术上的练习；它对农业和粮食安全具有现实意义。此外，downflow的概念在工程和环境管理中也适用。例如，在设计排水系统时，工程师必须考虑水如何在各种材料中向下流动。适当的规划可以防止洪水和侵蚀，保护基础设施和自然栖息地。在城市环境中，管理downflow对于防止污染进入水道至关重要。通过创建绿色空间和透水表面，城市可以增强自然的downflow过程，使雨水得以吸收，而不是流入雨水管道。此外，downflow的研究可以为气候变化提供见解。随着天气模式的变化，降雨的强度和频率可能会改变，影响水在景观中的流动方式。理解这些变化使科学家和政策制定者能够制定水资源保护和管理的策略，确保社区在面对环境挑战时保持韧性。总之，术语downflow涵盖了自然和工程系统中的一个重要过程。它的影响远不止于水的简单运动；它影响着生态系统健康、农业生产力和城市规划等方方面面。随着我们继续应对气候变化和城市化的影响，全面理解downflow将对可持续发展和资源管理至关重要。通过欣赏这一概念的重要性，我们可以努力创造与环境更平衡的关系，确保未来几代人能够享受清洁水源和健康生态系统。