Analysis of a Typical Case of Meteorological Service in Tangpu Reservoir

The continuous rainy precipitation process from February to March in 2019 was selected to analyze the effect of meteorological service in Tangpu Reservoir basin,so as to sum up service experience and then lay a better foundation for subsequent services.In response to the rainy weather from December 2018 to early 2019,three rounds of flood discharge were carried out in Tangpu Reservoir.During February-March in 2019,the hit rate of short-term area rainfall forecast for Tangpu Reservoir was 80.0%.Compared with the median of forecast interval,the average absolute error was 7.6 mm,and the relative error was 32.7%.The large deviation in the forecast from March 27 to 28 was deeply analyzed,and it is found that the main reasons were excessive reliance on and trust in a single model,insufficient correction of the actual situation,and insufficient judgment of the nature of precipitation.For the future reservoir meteorological service,three aspects of thinking were put forward,such as further strengthening the sharing of hydrological and meteorological information,improving the forecasting ability,and deepening the research of runoff forecast models.

Research on the Current Status, Paths and Countermeasures of Family Farm Development in China——Investigation and Analysis of Hubei Province

The Chinese family farm is the most important new micro subject in the construction and development of modern agriculture in China. The investigation and analysis of the actual situation of Hubei Province showed that since the implementation of the household contract management system in rural areas, the family farm has followed the track of gradual development, breakthrough development and normal standardization development. In order to promote the family farm to develop rapidly, orderly and healthily, work must be well done to land circulation, scale management, financial support, financial subsidy, cultivation of leading talents and professional farmers, and providing all-round services.

Community structure of zooplankton in reef area and its relationship with environmental factors

To better understand the community structure characteristics of zooplankton in the artificial reef area of Tianjin in the Bohai Bay and its relationship with major environmental factors,the project conducted three cruise surveys in the spring(May),summer(July)and autumn(October)of 2016 and monitored conventional environmental factors.The results showed that there were 36 species of zooplankton,including 14 species of copepods,phytoplankton larvae 12 species;6 kinds of coelenterates;3 species of shrimp and 1 species of hairy shrimp in the artificial reef area of Tianjin in the three cruise surveys.The dominant species in spring,summer,and autumn have obvious changes,among which the dominant species in spring are Eurytemora pacifica,Clytia hemisphoerica,Clalnus sinicus,and Macruran larva;in summer are Oithona similis and Brachyura zoea larva;and autumn only the Clalnus sinicus.Correlation analysis shows that the diversity and uniformity of zooplankton in the artificial reef area have increased to varying degrees,indicating that the overall construction of artificial reefs in the Tianjin sea area has improved the marine ecological protection to some extent.The results of CCA showed that salinity and water temperature were the main environmental factors affecting the distribution of zooplankton communities in artificial reefs in Tianjin.