كليدواژه :
سوبسيدانس , دوال , شق , حركات جنبا , سفره هاي آبي زيرزميني
چكيده فارسي :
محققان در سه دهه اخير تلاش گسترده اي را براي روشن ساختن علل بوجود آمدن ترك هاي دشت هاي رسوبي آغاز و غالباً ايجاد چنين شكاف هايي را به برداشت بيش از حد آب هاي زير زميني نسبت داده اند . اگرچه فرونشست در اين دشت ها به اعتبار اسناد معتبر علمي امري اثبات شده است ولي نسبت دادن آن به برداشت آب از سفره هاي زير زميني با ترديدهايي همراه بوده است، زيرا پديده "شق" يا "درام " براي بسياري از دهقانان ايراني قبل از بكارگيري تكنولوژي مكنده هاي ديزلي وحفرچاه هاي عميق پديده اي شناخته شده بوده است. از طرفي فرونشست تنها به دشت هايي با بيلان منفي محدود نشده و دشت هايي با بيلان مثبت را هم شامل مي شود. اين شواهد سبب شد كه براي روشن شدن علت اين موضوع به اتكا دو روش مختلف اسنادي و مدل سازي تجربي ازسفره زيرزميني در دو حالت ديناميك و استاتيك عملا به رصد رفتار اين گونه دشت ها در برابر برداشت آب از سفره ها و تحركات تكتونيكي مبادرت شود. نتايج حاصل از اين تحقيق نشان مي دهد كه : * پديده شق يا درام كه غالب محققان آنرا به برداشت بي رويه از سفره هاي آبي زيرزميني نسبت مي دهند داراي سابقه تاريخي بسيار طولاني تري است به گونه اي كه اين پديده قبل از رايج شدن تكنولوژي مكنده هاي ديزلي و حفر چاه هاي عميق براي بسياري از دهقانان ايراني پديده تجربه شده وشناخته شده اي بوده است.
چكيده لاتين :
In the last three decades, researchers have begun a wide-ranging effort to elucidate the causes of sedimentary cracks in the plains and have often attributed such gaps to excessive groundwater harvesting. Although subsidence in these plains has been proven credible by scientific documents, its relevance to water abstraction from underground aquifers has been subject to some uncertainty, as the "shag" or "drum" phenomenon has been pre-empted by many Iranian peasants. The adoption of diesel suction technology and deep wells has been a well-known phenomenon. On the other hand, subsidence is not confined to low-negative plains and positive-low plains. This evidence led to the observation of the behavior of these plains in terms of water abstraction from aquifers and tectonic motions to clarify the cause of this issue by relying on different types of documents and empirical modeling of the underground in both dynamic and static conditions. The results of this study show that:
* The phenomenon of drumming or drumming, which most scholars attribute to the overwhelming harvest of underground aquifers, has a much longer historical history, so that this phenomenon before many diesel diggers and digging wells for many Iranian peasants. The phenomenon has been experienced and recognized.In the last three decades, researchers have begun a wide-ranging effort to elucidate the causes of sedimentary cracks in the plains and have often attributed such gaps to excessive groundwater harvesting. Although subsidence in these plains has been proven credible by scientific documents, its relevance to water abstraction from underground aquifers has been subject to some uncertainty, as the "shag" or "drum" phenomenon has been pre-empted by many Iranian peasants. The adoption of diesel suction technology and deep wells has been a well-known phenomenon. On the other hand, subsidence is not confined to low-negative plains and positive-low plains. This evidence led to the observation of the behavior of these plains in terms of water abstraction from aquifers and tectonic motions to clarify the cause of this issue by relying on different types of documents and empirical modeling of the underground in both dynamic and static conditions. The results of this study show that:
* The phenomenon of drumming or drumming, which most scholars attribute to the overwhelming harvest of underground aquifers, has a much longer historical history, so that this phenomenon before many diesel diggers and digging wells for many Iranian peasants. The phenomenon has been experienced and recognized.In the last three decades, researchers have begun a wide-ranging effort to elucidate the causes of sedimentary cracks in the plains and have often attributed such gaps to excessive groundwater harvesting. Although subsidence in these plains has been proven credible by scientific documents, its relevance to water abstraction from underground aquifers has been subject to some uncertainty, as the "shag" or "drum" phenomenon has been pre-empted by many Iranian peasants. The adoption of diesel suction technology and deep wells has been a well-known phenomenon. On the other hand, subsidence is not confined to low-negative plains and positive-low plains. This evidence led to the observation of the behavior of these plains in terms of water abstraction from aquifers and tectonic motions to clarify the cause of this issue by relying on different types of documents and empirical modeling of the underground in both dynamic and static conditions. The results of this study show that:
* The phenomenon of drumming or drumming, which most scholars attribute to the overwhelming harvest of underground aquifers, has a much longer historical history, so that this phenomenon before many diesel diggers and digging wells for many Iranian peasants. The phenomenon has been experienced and recognized.In the last three decades, researchers have begun a wide-ranging effort to elucidate the causes of sedimentary cracks in the plains and have often attributed such gaps to excessive groundwater harvesting. Although subsidence in these plains has been proven credible by scientific documents, its relevance to water abstraction from underground aquifers has been subject to some uncertainty, as the "shag" or "drum" phenomenon has been pre-empted by many Iranian peasants. The adoption of diesel suction technology and deep wells has been a well-known phenomenon. On the other hand, subsidence is not confined to low-negative plains and positive-low plains. This evidence led to the observation of the behavior of these plains in terms of water abstraction from aquifers and tectonic motions to clarify the cause of this issue by relying on different types of documents and empirical modeling of the underground in both dynamic and static conditions. The results of this study show that:
* The phenomenon of drumming or drumming, which most scholars attribute to the overwhelming harvest of underground aquifers, has a much longer historical history, so that this phenomenon before many diesel diggers and digging wells for many Iranian peasants. The phenomenon has been experienced and recognized.
