The establishment of efficient ecological economic zone of the Yellow River Delta face the situation of large scale basic construction and resources consumption. It will aggravate the contradiction among economic de-velopment, resource consumption and environmental pollution. The formation time of land in the Yellow River Delta region is short, geological environment is fragile, fresh water resources are relatively scarce, ecological protection and restoration pressure of dike offshore are very large. In this paper, carrying ability of all kinds of human social and economic activities in this area, determination of geological resources and environment ( water resources, land resources) in this area have been determined, and effects of large scale human activities to resources and the en-vironment have been predicated. Geological resource and environment damaged by human activities in this area have been managed, and harmonious development between man and nature has been promoted.

Through investigation and collecting samples of different deep karst geothermal water,isotope δD,δ18O and radioactive isotope 14C have been determined,and the origin,age,property of geothermal reservoir and hydraulic connection have been analyzed.It is showed that the origin of deep karst geothermal water in Shandong is air precipitation.Its formation age is antique,recharge way is long and runoff velocity is slow.Hydraulic connection of the same strucute in coastal area and lonely island zone,Qihe and Liaocheng area is very close,while it is weak in other places.

According to lots of the former information,distribution and development characteristics of deep karst thermal reservoir in Shandong province have been analyzed.The delineated scope of deep karst geothermal reservoir is 44000km2,including 12 geothermal areas in total.Karst types are karst-fissure type and fissure-karst type.It has a guiding significance and reference value for further study,exploration and development and utilization of deep karst geothermal reservoir in Shandong province.

Due to massive exploitation of geothermal water in Dezhou city in many years, geothermal water level continued to decline, and formed a geothermal water depression cone centered in Dezhou City. Based on the analysis of water dynamics and geothermal exploitation rate in Guantao geothermal reservoir, the relationship between the amount of geothermal water withdrawed and water dynamics has been verified, and the impact of human activities have been furtherly revealed, and the correlation equation between the amount of geothermal water withdrawed and water dynamics has been set up. Through analysis on the e- quation trend, a warning exploitation rate of geothermal water in Guantao reservoir is put forward. It will provide a rational and scientific basis for the sustainable development and utilization of geothermal resource.

On the basis of collecting and analyzing the newly gained information,major ecological environment problems occurred in the downstream of the Yellow river are introduced in this paper,such as water pollution,water resource deficiency,ground subsidence,ground crack,ground collapse,sand liquefaction,soil salinization and instability of the dyke.Countermeasures for protecting ecological environment problems are put forward as well.It will have a high reference value in national resource exploitation,flood control,disaster protection and prevention,and eco-geological environment protection.

Through analysis on monitoring datas of land subsidence thoroughly in Dongying district,it is concluded that the main factors caused the land subsidence are oil and gas exploration and ground water extraction in long time which caused depression of reservoir stress;while other factors,such as Cenozoic tectonic movement,rising elevation of the sea water,natural compaction of the unconsolidated soil and ground-loadings also play an important role.