| 1. | In many low head hydraulic structure , expecially canal system structure , we are used a dopting underflow energy dissipation
在众多的低水头水工建筑物中，特别是渠系建筑物中的涵闸下游，多采用底流消能。 |
| 2. | Arch net floor has opened up a new way for the small - sized works , expecially for the canal system structures of low frouda number underflow energy dissipation
拱网为小型工程特别是渠系建筑物低佛氏数底流消能开辟了一条新途径。 |
| 3. | Layout forms of irrigation canal system can be generally classified as three categories : series - wound canal system , equivalent shunt - wound canal system and nonequivalent shunt - wound canal system
灌溉渠系的布置形式一般可分为串联渠系、等效并联渠系和非等效并联渠系，对这3种灌溉渠系水利用系数进行了理论研究。 |
| 4. | The results of correlation comprehensive array analysis indicated that the water seepage from canal systems was the main cause resulting in the uprising of underground water table and the increase of soil salinity in qyrid
同时通过关联度综合排序分析，确定出渠系渗漏是造成灌区地下水位高、土壤盐渍化的主要原因。 |
| 5. | The frozen damage of slab - foundation of channel irrigation structures in the northeast of china is the most serious and includes the general characteristics of frozen damage of the channel irrigation structures
我国冻土分布面积极为广阔，虽然东北地区渠系水工建筑物的板基冻害最为严重，但也是其它地区的共性问题。 |
| 6. | Abstract : layout forms of irrigation canal system can be generally classified as three categories : series - wound canal system , equivalent shunt - wound canal system and nonequivalent shunt - wound canal system
文摘:灌溉渠系的布置形式一般可分为串联渠系、等效并联渠系和非等效并联渠系，对这3种灌溉渠系水利用系数进行了理论研究。 |
| 7. | In this essay a kind of auxiliary energy dissipator arplying to underflow energy dissipation of low froude number is developed . it mainly applies to the small - sized projects , especially to the canal system structures
本文研究了一种适用于低佛氏数底流消能的辅助消能工? ?拱形网板(简称拱网) ，它特别适合于小型工程尤其是渠系建筑物。 |
| 8. | By optimisation of plan , the writer recommends a engineering arrangement plan of water - saving reform , a old channel system reform plan , in addition irrigation area fitting and water - saving in field plan
提出了灌区节水改造工程的建设规模和节水改造技术。通过方案优化，推荐了节水改造工程布置方案、老灌区渠系改造方案、灌区配套与田间节水工程方案。 |
| 9. | Formation and evolution of the shallow ground fresh water and brackish water is correlation with forming time of delta , characters of microtopography , as well as the distributing of present course and channel in alluvial - marine plain
黄河三角洲地下淡水、微咸水分布与形成演化与黄河河道的变迁、三角洲形成的早晚、微地貌特征及现代河道与渠系分布等因素密切相关。 |
| 10. | By using the p + pr algorithm and the technique of synchronous gate operation , a mathematical model of multireach canal systems in the mode of constant water - volume control was developed ; and it was programmed to simulate the control process
摘要应用闸门同步操作技术和p + pr算法，建立了多渠段串联渠系并有渠侧出流的等体积控制模型，并编程对控制过程进行实时模拟。 |
