water improvement

An investigation on the water improvement to reduce fluoride projects built in Henan

河南省新建改水降氟工程的调查

Effectiveness of water improvement in an endemic area with fluorosis

某地方性氟中毒单位改水一年半后效果初步调查

Study on Water Improvement Effect on Polluted Water by Submerged Macrophytes

沉水植物对污染水体的水质改善效应研究

A preliminary investigation on drinking water improvement for the prevention of hepatic cancer

饮用水改良对肝癌发病的预防效果初探

A Study on Comprehensive Benefits from Drinking Water Improvement in Rural Areas of Xinjiang Autonomous Region

新疆农村改水综合效益研究

Conclusions ① The government at all levels attached importance to the work of the water improvement .

结论①各级政府重视改水降氟工作，配套资金落实到位及时，工程建设按期完成。

Survey and analysis of water improvement to reduce fluoride in high fluoride areas in Heyuan city

河源市高氟区改水降氟效果调查分析

Objective To observe the effects of endemic goiter control by water improvement to reduce iodine .

目的观察改水降碘防治地方性高碘甲状腺肿效果。

Survey and Analysis of Water Improvement in Drinking-water Type Fluorosis Areas in Jieyang City

广东省揭阳市饮水型氟病区改水效果调查分析

The water improvement effects from different kinds of submerged macrophytes were studied according to contrastive experiments .

通过试验对比研究不同种类沉水植物对水质的改善效应；

Surveys on the effect of water improvement and the sanitary protection of water sources in Linyi City

临沂市改水效果及水源卫生防护状况调查

Objective To explore the effect of water improvement and the sanitary protection of water sources in Linyi City .

目的了解临沂市改水效果及水源的卫生防护状况。

Conclusions The key to obtain good benefit lies in strengthening the management and maintenance of the water improvement projects .

结论加强对改水工程的管理与维护是取得良好效益的保证；

Objective To evaluate the comprehensive benefit of water improvement to reduce fluoride project , and to direct the water improvement .

目的调查评价全省改水降氟工程综合效益，指导今后改水工作。

Study on water improvement function , capacity of lifting water and oxygenation of a water-lifting aerator

扬水曝气器的水质改善功能及提水、充氧性能研究

Objective To understand the effects of water improvement to reduce fluoride of endemic fluorosis in Chenzhou .

目的了解郴州市地方性氟中毒改水降氟效果，以及改水设施的管理和使用情况。

Objective To analyze the functional metabolism changes of drinking-skeletal fluorosis patients after water improvement for 18 years .

目的了解改水降氟18年后氟骨症患者机体的功能代谢状况。

Investment in the water improvement project in water-deficient areas totaled 31 billion yuan between 1993-99 .

1993-1999年全国缺水地区改水累计投资达310亿元。

The Testing Report on Fluoride and Arsenic Alteration after the Water Improvement in Xinjiang Miquan

新疆米泉市改水后水氟、水砷检测报告

Assessment to the effect of water improvement in the endemic fluorosis areas in Guangzhou , Huizhou and Chaozhou city

广州、惠州和潮州3市高氟区改水效果评价

The additional income in cash in the villages after water improvement is 33.11 times as much as total investment of the 200 projects .

200个村每年增加的现金收入是改水工程投资总额的33.11倍。

Epidemiological Analysis of Dental Fluorosis Prevalence in the Children After Water Improvement Based Reduction of Fluoride in the Fluorosis Areas in Guangdong Province

广东省饮水型氟病区改水后儿童氟斑牙患病情况流行病学分析

Retrospective investigation on Change in Incidence Rates of Endemic Fluorosis in Epidemic Fluorosis Areas of Shantou City with Drinking Water Improvement

汕头市氟病区改水后地氟病患病率变化规律的回顾性调查

Study the biomass impact on water improvement effect by different kinds of submerged macrophytes . The results interpreted from the experiments provide the reference to project .

研究生物量对不同沉水植物水质改善效应的影响，从试验得出生物量的影响结果，为工程应用提供参考；

Objective To understand the using state of water improvement to reduce fluoride project and the effect of reducing fluoride in drinking water type fluorosis areas in Hunan .

目的为了解湖南省饮水型氟中毒病区改水工程运行情况及其降氟效果。

No significant negative effects were found in the levels of 4 elements metioned above in serum among children borned after water improvement in 3 areas mentioned above .

改水后出生的儿童3个地区上述4种元素相比均未发现有不良影响。

Due to the different requirements on habitat condition from different submerged macrophytes , the water improvement effects were studied by making artificial waste water charactered with different ratio of nitrogen and phosphorus in different water quality .

由于不同沉水植物对生境条件的要求不同，通过配制不同氮磷比例的人工污水，在不同水质条件下对比研究沉水植物的水质改善效应。

Objective To understand the using state of water improvement to reduce fluoride project and effect of reducing fluoride in drinking-water type fluorosis areas in order to direct the prevention of endemic fluorosis in Gansu province .

目的了解甘肃省秦安县饮水型氟中毒病区改水工程运行情况及其降氟效果，用于指导全省地氟病防治。

The project of drinking water improvement greatly ameliorates drinking water conditions and reduces waterborne infectious diseases in rural areas of Xinjiang , where the habits of farmers and environment are varying gradually but profoundly .

新疆改水工程大大改善了农村饮水条件，使介水传染病发病率减小，环境及生活习惯都发生了可喜变化。

In a given range of biomass with the increase of biomass , the water improvement effects by Elodea nuttallii , Potamogetor crispus and Hydrillaverticillata become more obviously .

在一定生物量范围内，伊乐藻、菹草和黑藻对水质改善效应随生物量增加而增大；