PRELIMINARY STUDY ON THE FLOODING AND DROUGHT CLAMITY DURING PAST 1500 YEARS IN THE HAI′AN REGION，JIANGSU PROVINCE

Collection and arrangement of the historical records of climatic changes and environment evolution,espectial-lyin the aspect of calamities,are made on the history documents of past 1500 years about Haiˊan region,Jiangsu Province.There existed two obvious flooding-drought frequently-occurring periods:one was from 1550 AD to 1850 AD and another was 100 AD to 1200AD.The period of 1550 AD to1850 AD is interrupted by two relatively arid and cold climatic periods:one was from 1630 AD to 1700 AD and another was 1750 AD to 1820 AD.The main characteristic of the calamity periods is that they occurred by turns,and sometimes,both drought and flooding occurred in the same year.The instability of the climatic changes in the Little Ice Age may be the main reason of the frequently-occurring flooding and drought in Haiˊan region.Research results also show that the frequently-occurring periods of flooding and drought is in close relationship with the solar activity,and therefore,occurrence of the flooding and drought may be in relation with the intensity of the solar activity.This hypothesis may need further study in the future.     

一种有发展前景的隧道及井巷超前预报技术——电磁导弹探测技术

对于隧道和煤矿井巷的安全掘进 ,超前预报显得特别重要。但由于掌子面前的特殊环境限制及多种干扰的严重影响 ,给隧道及井巷超前预报技术的研究带来许多困难。在瞬变电磁理论的基础上 ,引入新的电磁传播理论———电磁导弹技术 ,作为对该技术的初步探索 ,文章论证了该技术在隧道超前预报中应用的可能性 ,并提出了研究的主要内容和发展方向以及可能取得的新的技术突破和技术支撑     

FEASIBLE STUDY ON THE INTEGRATION SYSTEM FOR THE SPACE MONITORING OF MAJOR EARTHQUAKES AND VOLCANOES IN TERRESTRIAL LAND

With the rapid development of space technology, earth observation technology and sky observatory technolo-gy, they have played a more and more important part in monitoring and predicting of earthquakes and volcanoes in the terres-trial land. In recent years, the related agencies have done the experiments and researches on monitoring and predicting ofearthquakes and volcanoes in the forewarning period by means of many approaches, such as satellite thermal infrared re-mote sensing (TIRS), Global Positioning System (GPS), differential interferometric synthesis aperture radar (D-INSAR),astronomical time-latitude residual anomaly, and Geographic Information Systems (GIS), etc. A quite large number of re-search foundation has been built in the fundamental theories and application methods. The experiments and researcheshave shown that these technology is efficient methods for high frequency crust movement. If the existed separate scientificforces and results are possibly assembled together to form a more complete integration monitoring system with the combina-tion of space, sky observation, ground, deep geology and macro anomaly, it will come into a new stage of monitoring andpredicting of earthquakes and volcanic eruptions.     

Ab Initio Prediction of ^29Si-NMR Chemical Shifts

The ability of several ab initio models to predict experimental 29Si-NMR chemical shift is examined. The shielding values of trimethylsilyl chloride (A), t-butyldimethylsilyl chloride (B) and allyltrimethylsilane (C) are calculated by GIAO, CSGT and IGAIM methods, using HF/6-31G^*, B3LYP/6-31G^* , HF/6-311 G^**, B3LYP/6-311 G^** and MPWlPW91/6-311 G^** models respectively. The 29Si chemical shifts calculated by GIAO method using HF/6-311 G^** model are highly in agreement with those obtained experimentally. All of the models above reproduce the trends of chemical shifts in all cases studied, suggesting that the models are of practical value.     

潢川县土地整理注重实效

近年来，潢川县以保护耕地总量动态平衡为目标，逐年加大上地整理复垦力度，不断增加耕地面积．提高土地产出率．为农业结构调整、粮食基地建设和基础设施建设构筑保障平台．促进了当地经济的可持续发展。从去年初至今年9月份，全县累计实施土地整理复垦面积3267亩，净增耕地2665亩。     

时代呼唤：农业地质浮出水面

提到农业地质，人们不应当忘记这个名字：爱尔。1916年这位年轻的英国剑桥大学地质系教授对土壤产生了浓厚的兴趣，他认为世界工业的飞速发展，产生的废物会污染土壤。当他将一些土壤放到实验室研究时果然印证了他的设想。作为地质学家，他认为消除土壤侵蚀的关键应是首先采用地质方法进行调查，根据     

山东省基本农田保护条例

第一章　总则第一条　为加强对基本农田的保护,稳定耕地面积,确保粮食安全,促进农业生产和经济社会的可持续发展,根据《中华人民共和国土地管理法》、《中华人民共和国农业法》、国务院《基本农田保护条例》等法律、法规,结合本省实际,制定本条例。第二条　本条例所称基本农田,是指依据土地利用总体规划确定的不得占用的耕地。本条例所称基本农田保护区是指为对基本农田实行特殊保护,按照法定程序确定的特定保护区域。第三条　本条例适用于本省行政区域内基本农田保护区的划定、保护和监督管理。第四条　县级以上人民政府应当将基本农田保护…     

实施农村规划 进行土地挖潜

汤阴县位于河南省北部，属河南省安阳市所辖，是一个农业县。土地总面积645.86平方公里，其中：耕地占土地总面积的63．4％，其它土地占36．6％。全县设5乡5镇，297个行政村。农业户口、农业人口分别占总户数、总人口的77．7％和85．5％。     

土地管理制度创新与农民增收

土地管理制度创新在各地创造了许多鲜活、有效的经验，为农民增收、农业增效、农村经济发展提供了保障。同时还有一些问题亟待解决。调整政策、完善机制才能更好地为解决好“三农”问题，特别是农民增收问题，作出国土资源管理部门应有的贡献。     

王岗，十年建房“不下岗”

在河南省方城县赵河镇西北部的王岗村，是赵河镇面积最大，人口最多，人均耕地最少的村。全村祖祖辈辈就依赖两条水渠及渠外仅有的耕地，栽烟种粮，维持生计。